package object_detection.protos

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Configuration message for the AdamOptimizer See: https://www.tensorflow.org/api_docs/python/tf/train/AdamOptimizer

Used in: Optimizer

• optional LearningRate learning_rate = 1

• optional float adam_beta1 = 2

• optional float adam_beta2 = 3

• optional float adam_epsilon = 4

Configuration proto for the anchor generator to use in the object detection pipeline. See core/anchor_generator.py for details.

Used in: FasterRcnn, Ssd

• oneof anchor_generator_oneof

  • GridAnchorGenerator grid_anchor_generator = 1

  • SsdAnchorGenerator ssd_anchor_generator = 2

  • MultiscaleAnchorGenerator multiscale_anchor_generator = 3

Configuration proto for ArgMaxMatcher. See matchers/argmax_matcher.py for details.

Used in: Matcher

• optional float matched_threshold = 1

  Threshold for positive matches.

• optional float unmatched_threshold = 2

  Threshold for negative matches.

• optional bool ignore_thresholds = 3

  Whether to construct ArgMaxMatcher without thresholds.

• optional bool negatives_lower_than_unmatched = 4

  If True then negative matches are the ones below the unmatched_threshold, whereas ignored matches are in between the matched and umatched threshold. If False, then negative matches are in between the matched and unmatched threshold, and everything lower than unmatched is ignored.

• optional bool force_match_for_each_row = 5

  Whether to ensure each row is matched to at least one column.

• optional bool use_matmul_gather = 6

  Force constructed match objects to use matrix multiplication based gather instead of standard tf.gather

Configuration proto for non-max-suppression operation on a batch of detections.

Used in: PostProcessing

• optional float score_threshold = 1

  Scalar threshold for score (low scoring boxes are removed).

• optional float iou_threshold = 2

  Scalar threshold for IOU (boxes that have high IOU overlap with previously selected boxes are removed).

• optional int32 max_detections_per_class = 3

  Maximum number of detections to retain per class.

• optional int32 max_total_detections = 5

  Maximum number of detections to retain across all classes.

Configuration proto for batch norm to apply after convolution op. See https://www.tensorflow.org/api_docs/python/tf/contrib/layers/batch_norm

Used in: Hyperparams

• optional float decay = 1

• optional bool center = 2

• optional bool scale = 3

• optional float epsilon = 4

• optional bool train = 5

  Whether to train the batch norm variables. If this is set to false during training, the current value of the batch_norm variables are used for forward pass but they are never updated.

Configuration proto for bipartite matcher. See matchers/bipartite_matcher.py for details.

Used in: Matcher

• optional bool use_matmul_gather = 6

  Force constructed match objects to use matrix multiplication based gather instead of standard tf.gather

Classification loss using a sigmoid function over the class prediction with the highest prediction score.

Used in: ClassificationLoss

• optional float alpha = 1

  Interpolation weight between 0 and 1.

• optional bool hard_bootstrap = 2

  Whether hard boot strapping should be used or not. If true, will only use one class favored by model. Othewise, will use all predicted class probabilities.

• optional bool anchorwise_output = 3

  DEPRECATED, do not use. Output loss per anchor.

Configuration proto for the box coder to be used in the object detection pipeline. See core/box_coder.py for details.

Used in: Ssd

• oneof box_coder_oneof

  • FasterRcnnBoxCoder faster_rcnn_box_coder = 1

  • MeanStddevBoxCoder mean_stddev_box_coder = 2

  • SquareBoxCoder square_box_coder = 3

  • KeypointBoxCoder keypoint_box_coder = 4

Configuration proto for box predictor. See core/box_predictor.py for details.

Used in: FasterRcnn, Ssd

• oneof box_predictor_oneof

  • ConvolutionalBoxPredictor convolutional_box_predictor = 1

  • MaskRCNNBoxPredictor mask_rcnn_box_predictor = 2

  • RfcnBoxPredictor rfcn_box_predictor = 3

  • WeightSharedConvolutionalBoxPredictor weight_shared_convolutional_box_predictor = 4

Configuration for class prediction loss function.

Used in: FasterRcnn, Loss

• oneof classification_loss

  • WeightedSigmoidClassificationLoss weighted_sigmoid = 1

  • WeightedSoftmaxClassificationLoss weighted_softmax = 2

  • BootstrappedSigmoidClassificationLoss bootstrapped_sigmoid = 3

  • SigmoidFocalClassificationLoss weighted_sigmoid_focal = 4

Configuration message for a constant learning rate.

Used in: LearningRate

• optional float learning_rate = 1

Configuration proto for Convolutional box predictor.

Used in: BoxPredictor

• optional Hyperparams conv_hyperparams = 1

  Hyperparameters for convolution ops used in the box predictor.

• optional int32 min_depth = 2

  Minumum feature depth prior to predicting box encodings and class predictions.

• optional int32 max_depth = 3

  Maximum feature depth prior to predicting box encodings and class predictions. If max_depth is set to 0, no additional feature map will be inserted before location and class predictions.

• optional int32 num_layers_before_predictor = 4

  Number of the additional conv layers before the predictor.

• optional bool use_dropout = 5

  Whether to use dropout for class prediction.

• optional float dropout_keep_probability = 6

  Keep probability for dropout

• optional int32 kernel_size = 7

  Size of final convolution kernel. If the spatial resolution of the feature map is smaller than the kernel size, then the kernel size is set to min(feature_width, feature_height).

• optional int32 box_code_size = 8

  Size of the encoding for boxes.

• optional bool apply_sigmoid_to_scores = 9

  Whether to apply sigmoid to the output of class predictions. TODO(jonathanhuang): Do we need this since we have a post processing module.?

• optional float class_prediction_bias_init = 10

• optional bool use_depthwise = 11

  Whether to use depthwise separable convolution for box predictor layers.

Configuration message for a cosine decaying learning rate as defined in object_detection/utils/learning_schedules.py

Used in: LearningRate

• optional float learning_rate_base = 1

• optional uint32 total_steps = 2

• optional float warmup_learning_rate = 3

• optional uint32 warmup_steps = 4

Top level configuration for DetectionModels.

Used in: TrainEvalPipelineConfig

• oneof model

  • FasterRcnn faster_rcnn = 1

  • Ssd ssd = 2

Message for configuring DetectionModel evaluation jobs (eval.py).

Used in: TrainEvalPipelineConfig

• optional uint32 num_visualizations = 1

  Number of visualization images to generate.

• optional uint32 num_examples = 2

  Number of examples to process of evaluation.

• optional uint32 eval_interval_secs = 3

  How often to run evaluation.

• optional uint32 max_evals = 4

  Maximum number of times to run evaluation. If set to 0, will run forever.

• optional bool save_graph = 5

  Whether the TensorFlow graph used for evaluation should be saved to disk.

• optional string visualization_export_dir = 6

  Path to directory to store visualizations in. If empty, visualization images are not exported (only shown on Tensorboard).

• optional string eval_master = 7

  BNS name of the TensorFlow master.

• repeated string metrics_set = 8

  Type of metrics to use for evaluation.

• optional string export_path = 9

  Path to export detections to COCO compatible JSON format.

• optional bool ignore_groundtruth = 10

  Option to not read groundtruth labels and only export detections to COCO-compatible JSON file.

• optional bool use_moving_averages = 11

  Use exponential moving averages of variables for evaluation. TODO(rathodv): When this is false make sure the model is constructed without moving averages in restore_fn.

• optional bool eval_instance_masks = 12

  Whether to evaluate instance masks. Note that since there is no evaluation code currently for instance segmenation this option is unused.

• optional float min_score_threshold = 13

  Minimum score threshold for a detected object box to be visualized

• optional int32 max_num_boxes_to_visualize = 14

  Maximum number of detections to visualize

• optional bool skip_scores = 15

  When drawing a single detection, each label is by default visualized as <label name> : <label score>. One can skip the name or/and score using the following fields:

• optional bool skip_labels = 16

• optional bool visualize_groundtruth_boxes = 17

  Whether to show groundtruth boxes in addition to detected boxes in visualizations.

• optional string groundtruth_box_visualization_color = 18

  Box color for visualizing groundtruth boxes.

• optional bool keep_image_id_for_visualization_export = 19

  Whether to keep image identifier in filename when exported to visualization_export_dir.

Configuration message for an exponentially decaying learning rate. See https://www.tensorflow.org/versions/master/api_docs/python/train/ \ decaying_the_learning_rate#exponential_decay

Used in: LearningRate

• optional float initial_learning_rate = 1

• optional uint32 decay_steps = 2

• optional float decay_factor = 3

• optional bool staircase = 4

An externally defined input reader. Users may define an extension to this proto to interface their own input readers.

Used in: InputReader

(message has no fields)

Configuration for Faster R-CNN models. See meta_architectures/faster_rcnn_meta_arch.py and models/model_builder.py Naming conventions: Faster R-CNN models have two stages: a first stage region proposal network (or RPN) and a second stage box classifier. We thus use the prefixes `first_stage_` and `second_stage_` to indicate the stage to which each parameter pertains when relevant.

Used in: DetectionModel

• optional int32 number_of_stages = 1

  Whether to construct only the Region Proposal Network (RPN).

• optional int32 num_classes = 3

  Number of classes to predict.

• optional ImageResizer image_resizer = 4

  Image resizer for preprocessing the input image.

• optional FasterRcnnFeatureExtractor feature_extractor = 5

  Feature extractor config.

• optional AnchorGenerator first_stage_anchor_generator = 6

  Anchor generator to compute RPN anchors.

• optional int32 first_stage_atrous_rate = 7

  Atrous rate for the convolution op applied to the `first_stage_features_to_crop` tensor to obtain box predictions.

• optional Hyperparams first_stage_box_predictor_conv_hyperparams = 8

  Hyperparameters for the convolutional RPN box predictor.

• optional int32 first_stage_box_predictor_kernel_size = 9

  Kernel size to use for the convolution op just prior to RPN box predictions.

• optional int32 first_stage_box_predictor_depth = 10

  Output depth for the convolution op just prior to RPN box predictions.

• optional int32 first_stage_minibatch_size = 11

  The batch size to use for computing the first stage objectness and location losses.

• optional float first_stage_positive_balance_fraction = 12

  Fraction of positive examples per image for the RPN.

• optional float first_stage_nms_score_threshold = 13

  Non max suppression score threshold applied to first stage RPN proposals.

• optional float first_stage_nms_iou_threshold = 14

  Non max suppression IOU threshold applied to first stage RPN proposals.

• optional int32 first_stage_max_proposals = 15

  Maximum number of RPN proposals retained after first stage postprocessing.

• optional float first_stage_localization_loss_weight = 16

  First stage RPN localization loss weight.

• optional float first_stage_objectness_loss_weight = 17

  First stage RPN objectness loss weight.

• optional int32 initial_crop_size = 18

  Output size (width and height are set to be the same) of the initial bilinear interpolation based cropping during ROI pooling.

• optional int32 maxpool_kernel_size = 19

  Kernel size of the max pool op on the cropped feature map during ROI pooling.

• optional int32 maxpool_stride = 20

  Stride of the max pool op on the cropped feature map during ROI pooling.

• optional BoxPredictor second_stage_box_predictor = 21

  Hyperparameters for the second stage box predictor. If box predictor type is set to rfcn_box_predictor, a R-FCN model is constructed, otherwise a Faster R-CNN model is constructed.

• optional int32 second_stage_batch_size = 22

  The batch size per image used for computing the classification and refined location loss of the box classifier. Note that this field is ignored if `hard_example_miner` is configured.

• optional float second_stage_balance_fraction = 23

  Fraction of positive examples to use per image for the box classifier.

• optional PostProcessing second_stage_post_processing = 24

  Post processing to apply on the second stage box classifier predictions. Note: the `score_converter` provided to the FasterRCNNMetaArch constructor is taken from this `second_stage_post_processing` proto.

• optional float second_stage_localization_loss_weight = 25

  Second stage refined localization loss weight.

• optional float second_stage_classification_loss_weight = 26

  Second stage classification loss weight

• optional float second_stage_mask_prediction_loss_weight = 27

  Second stage instance mask loss weight. Note that this is only applicable when `MaskRCNNBoxPredictor` is selected for second stage and configured to predict instance masks.

• optional HardExampleMiner hard_example_miner = 28

  If not left to default, applies hard example mining only to classification and localization loss..

• optional ClassificationLoss second_stage_classification_loss = 29

  Loss for second stage box classifers, supports Softmax and Sigmoid. Note that score converter must be consistent with loss type. When there are multiple labels assigned to the same boxes, recommend to use sigmoid loss and enable merge_multiple_label_boxes. If not specified, Softmax loss is used as default.

Configuration proto for FasterRCNNBoxCoder. See box_coders/faster_rcnn_box_coder.py for details.

Used in: BoxCoder

• optional float y_scale = 1

  Scale factor for anchor encoded box center.

• optional float x_scale = 2

• optional float height_scale = 3

  Scale factor for anchor encoded box height.

• optional float width_scale = 4

  Scale factor for anchor encoded box width.

Used in: FasterRcnn

• optional string type = 1

  Type of Faster R-CNN model (e.g., 'faster_rcnn_resnet101'; See builders/model_builder.py for expected types).

• optional int32 first_stage_features_stride = 2

  Output stride of extracted RPN feature map.

• optional bool batch_norm_trainable = 3

  Whether to update batch norm parameters during training or not. When training with a relative large batch size (e.g. 8), it could be desirable to enable batch norm update.

Configuration proto for image resizer that resizes to a fixed shape.

Used in: ImageResizer

• optional int32 height = 1

  Desired height of image in pixels.

• optional int32 width = 2

  Desired width of image in pixels.

• optional ResizeType resize_method = 3

  Desired method when resizing image.

• optional bool convert_to_grayscale = 4

  Whether to also resize the image channels from 3 to 1 (RGB to grayscale).

Configuration proto for GridAnchorGenerator. See anchor_generators/grid_anchor_generator.py for details.

Used in: AnchorGenerator

• optional int32 height = 1

  Anchor height in pixels.

• optional int32 width = 2

  Anchor width in pixels.

• optional int32 height_stride = 3

  Anchor stride in height dimension in pixels.

• optional int32 width_stride = 4

  Anchor stride in width dimension in pixels.

• optional int32 height_offset = 5

  Anchor height offset in pixels.

• optional int32 width_offset = 6

  Anchor width offset in pixels.

• repeated float scales = 7

  List of scales for the anchors.

• repeated float aspect_ratios = 8

  List of aspect ratios for the anchors.

Configuation for hard example miner.

Used in: FasterRcnn, Loss

• optional int32 num_hard_examples = 1

  Maximum number of hard examples to be selected per image (prior to enforcing max negative to positive ratio constraint). If set to 0, all examples obtained after NMS are considered.

• optional float iou_threshold = 2

  Minimum intersection over union for an example to be discarded during NMS.

• optional HardExampleMiner.LossType loss_type = 3

• optional int32 max_negatives_per_positive = 4

  Maximum number of negatives to retain for each positive anchor. If num_negatives_per_positive is 0 no prespecified negative:positive ratio is enforced.

• optional int32 min_negatives_per_image = 5

  Minimum number of negative anchors to sample for a given image. Setting this to a positive number samples negatives in an image without any positive anchors and thus not bias the model towards having at least one detection per image.

Whether to use classification losses ('cls', default), localization losses ('loc') or both losses ('both'). In the case of 'both', cls_loss_weight and loc_loss_weight are used to compute weighted sum of the two losses.

Used in: HardExampleMiner

• BOTH = 0

• CLASSIFICATION = 1

• LOCALIZATION = 2

Configuration proto for the convolution op hyperparameters to use in the object detection pipeline.

Used in: ConvolutionalBoxPredictor, FasterRcnn, MaskRCNNBoxPredictor, RfcnBoxPredictor, SsdFeatureExtractor, WeightSharedConvolutionalBoxPredictor

• optional Hyperparams.Op op = 1

• optional Regularizer regularizer = 2

  Regularizer for the weights of the convolution op.

• optional Initializer initializer = 3

  Initializer for the weights of the convolution op.

• optional Hyperparams.Activation activation = 4

• optional BatchNorm batch_norm = 5

  BatchNorm hyperparameters. If this parameter is NOT set then BatchNorm is not applied!

Type of activation to apply after convolution.

Used in: Hyperparams

• NONE = 0

  Use None (no activation)

• RELU = 1

  Use tf.nn.relu

• RELU_6 = 2

  Use tf.nn.relu6

Operations affected by hyperparameters.

Used in: Hyperparams

• CONV = 1

  Convolution, Separable Convolution, Convolution transpose.

• FC = 2

  Fully connected

Configuration proto for image resizing operations. See builders/image_resizer_builder.py for details.

Used in: FasterRcnn, Ssd

• oneof image_resizer_oneof

  • KeepAspectRatioResizer keep_aspect_ratio_resizer = 1

  • FixedShapeResizer fixed_shape_resizer = 2

Proto with one-of field for initializers.

Used in: Hyperparams

• oneof initializer_oneof

  • TruncatedNormalInitializer truncated_normal_initializer = 1

  • VarianceScalingInitializer variance_scaling_initializer = 2

  • RandomNormalInitializer random_normal_initializer = 3

Used in: TrainEvalPipelineConfig

• optional string label_map_path = 1

  Path to StringIntLabelMap pbtxt file specifying the mapping from string labels to integer ids.

• optional bool shuffle = 2

  Whether data should be processed in the order they are read in, or shuffled randomly.

• optional uint32 shuffle_buffer_size = 11

  Buffer size to be used when shuffling.

• optional uint32 filenames_shuffle_buffer_size = 12

  Buffer size to be used when shuffling file names.

• optional uint32 queue_capacity = 3

  Maximum number of records to keep in reader queue.

• optional uint32 min_after_dequeue = 4

  Minimum number of records to keep in reader queue. A large value is needed to generate a good random shuffle.

• optional uint32 num_epochs = 5

  The number of times a data source is read. If set to zero, the data source will be reused indefinitely.

• optional uint32 num_readers = 6

  Number of reader instances to create.

• optional uint32 prefetch_size = 13

  Number of decoded records to prefetch before batching.

• optional uint32 num_parallel_map_calls = 14

  Number of parallel decode ops to apply.

• optional bool load_instance_masks = 7

  Whether to load groundtruth instance masks.

• optional InstanceMaskType mask_type = 10

  Type of instance mask.

• oneof input_reader

  • TFRecordInputReader tf_record_input_reader = 8

  • ExternalInputReader external_input_reader = 9

Instance mask format. Note that PNG masks are much more space efficient.

Used in: InputReader

• DEFAULT = 0

  Default implementation, currently NUMERICAL_MASKS

• NUMERICAL_MASKS = 1

  [num_masks, H, W] float32 binary masks.

• PNG_MASKS = 2

  Encoded PNG masks.

Configuration for intersection-over-area (IOA) similarity calculator.

Used in: RegionSimilarityCalculator

(message has no fields)

Configuration for intersection-over-union (IOU) similarity calculator.

Used in: RegionSimilarityCalculator

(message has no fields)

Configuration proto for image resizer that keeps aspect ratio.

Used in: ImageResizer

• optional int32 min_dimension = 1

  Desired size of the smaller image dimension in pixels.

• optional int32 max_dimension = 2

  Desired size of the larger image dimension in pixels.

• optional ResizeType resize_method = 3

  Desired method when resizing image.

• optional bool pad_to_max_dimension = 4

  Whether to pad the image with zeros so the output spatial size is [max_dimension, max_dimension]. Note that the zeros are padded to the bottom and the right of the resized image.

• optional bool convert_to_grayscale = 5

  Whether to also resize the image channels from 3 to 1 (RGB to grayscale).

Configuration proto for KeypointBoxCoder. See box_coders/keypoint_box_coder.py for details.

Used in: BoxCoder

• optional int32 num_keypoints = 1

• optional float y_scale = 2

  Scale factor for anchor encoded box center and keypoints.

• optional float x_scale = 3

• optional float height_scale = 4

  Scale factor for anchor encoded box height.

• optional float width_scale = 5

  Scale factor for anchor encoded box width.

Configuration proto for L1 Regularizer. See https://www.tensorflow.org/api_docs/python/tf/contrib/layers/l1_regularizer

Used in: Regularizer

• optional float weight = 1

Configuration proto for L2 Regularizer. See https://www.tensorflow.org/api_docs/python/tf/contrib/layers/l2_regularizer

Used in: Regularizer

• optional float weight = 1

Configuration message for optimizer learning rate.

Used in: AdamOptimizer, MomentumOptimizer, RMSPropOptimizer

• oneof learning_rate

  • ConstantLearningRate constant_learning_rate = 1

  • ExponentialDecayLearningRate exponential_decay_learning_rate = 2

  • ManualStepLearningRate manual_step_learning_rate = 3

  • CosineDecayLearningRate cosine_decay_learning_rate = 4

Configuration for bounding box localization loss function.

Used in: Loss

• oneof localization_loss

  • WeightedL2LocalizationLoss weighted_l2 = 1

  • WeightedSmoothL1LocalizationLoss weighted_smooth_l1 = 2

  • WeightedIOULocalizationLoss weighted_iou = 3

Message for configuring the localization loss, classification loss and hard example miner used for training object detection models. See core/losses.py for details

Used in: Ssd

• optional LocalizationLoss localization_loss = 1

  Localization loss to use.

• optional ClassificationLoss classification_loss = 2

  Classification loss to use.

• optional HardExampleMiner hard_example_miner = 3

  If not left to default, applies hard example mining.

• optional float classification_weight = 4

  Classification loss weight.

• optional float localization_weight = 5

  Localization loss weight.

Configuration message for a manually defined learning rate schedule.

Used in: LearningRate

• optional float initial_learning_rate = 1

• repeated ManualStepLearningRate.LearningRateSchedule schedule = 2

Used in: ManualStepLearningRate

• optional uint32 step = 1

• optional float learning_rate = 2

Used in: BoxPredictor

• optional Hyperparams fc_hyperparams = 1

  Hyperparameters for fully connected ops used in the box predictor.

• optional bool use_dropout = 2

  Whether to use dropout op prior to the both box and class predictions.

• optional float dropout_keep_probability = 3

  Keep probability for dropout. This is only used if use_dropout is true.

• optional int32 box_code_size = 4

  Size of the encoding for the boxes.

• optional Hyperparams conv_hyperparams = 5

  Hyperparameters for convolution ops used in the box predictor.

• optional bool predict_instance_masks = 6

  Whether to predict instance masks inside detection boxes.

• optional int32 mask_prediction_conv_depth = 7

  The depth for the first conv2d_transpose op applied to the image_features in the mask prediction branch. If set to 0, the value will be set automatically based on the number of channels in the image features and the number of classes.

• optional bool predict_keypoints = 8

  Whether to predict keypoints inside detection boxes.

• optional int32 mask_height = 9

  The height and the width of the predicted mask.

• optional int32 mask_width = 10

• optional int32 mask_prediction_num_conv_layers = 11

  The number of convolutions applied to image_features in the mask prediction branch.

Configuration proto for the matcher to be used in the object detection pipeline. See core/matcher.py for details.

Used in: Ssd

• oneof matcher_oneof

  • ArgMaxMatcher argmax_matcher = 1

  • BipartiteMatcher bipartite_matcher = 2

Configuration proto for MeanStddevBoxCoder. See box_coders/mean_stddev_box_coder.py for details.

Used in: BoxCoder

(message has no fields)

Configuration message for the MomentumOptimizer See: https://www.tensorflow.org/api_docs/python/tf/train/MomentumOptimizer

Used in: Optimizer

• optional LearningRate learning_rate = 1

• optional float momentum_optimizer_value = 2

Configuration proto for RetinaNet anchor generator described in https://arxiv.org/abs/1708.02002. See anchor_generators/multiscale_grid_anchor_generator.py for details.

Used in: AnchorGenerator

• optional int32 min_level = 1

  minimum level in feature pyramid

• optional int32 max_level = 2

  maximum level in feature pyramid

• optional float anchor_scale = 3

  Scale of anchor to feature stride

• repeated float aspect_ratios = 4

  Aspect ratios for anchors at each grid point.

• optional int32 scales_per_octave = 5

  Number of intermediate scale each scale octave

• optional bool normalize_coordinates = 6

  Whether to produce anchors in normalized coordinates.

Configuration for negative squared distance similarity calculator.

Used in: RegionSimilarityCalculator

(message has no fields)

Normalizes pixel values in an image. For every channel in the image, moves the pixel values from the range [original_minval, original_maxval] to [target_minval, target_maxval].

Used in: PreprocessingStep

• optional float original_minval = 1

• optional float original_maxval = 2

• optional float target_minval = 3

• optional float target_maxval = 4

Top level optimizer message.

Used in: TrainConfig

• oneof optimizer

  • RMSPropOptimizer rms_prop_optimizer = 1

  • MomentumOptimizer momentum_optimizer = 2

  • AdamOptimizer adam_optimizer = 3

• optional bool use_moving_average = 4

• optional float moving_average_decay = 5

Configuration proto for post-processing predicted boxes and scores.

Used in: FasterRcnn, Ssd

• optional BatchNonMaxSuppression batch_non_max_suppression = 1

  Non max suppression parameters.

• optional PostProcessing.ScoreConverter score_converter = 2

  Score converter to use.

• optional float logit_scale = 3

  Scale logit (input) value before conversion in post-processing step. Typically used for softmax distillation, though can be used to scale for other reasons.

Enum to specify how to convert the detection scores.

Used in: PostProcessing

• IDENTITY = 0

  Input scores equals output scores.

• SIGMOID = 1

  Applies a sigmoid on input scores.

• SOFTMAX = 2

  Applies a softmax on input scores

Message for defining a preprocessing operation on input data. See: //third_party/tensorflow_models/object_detection/core/preprocessor.py

Used in: TrainConfig

• oneof preprocessing_step

  • NormalizeImage normalize_image = 1

  • RandomHorizontalFlip random_horizontal_flip = 2

  • RandomPixelValueScale random_pixel_value_scale = 3

  • RandomImageScale random_image_scale = 4

  • RandomRGBtoGray random_rgb_to_gray = 5

  • RandomAdjustBrightness random_adjust_brightness = 6

  • RandomAdjustContrast random_adjust_contrast = 7

  • RandomAdjustHue random_adjust_hue = 8

  • RandomAdjustSaturation random_adjust_saturation = 9

  • RandomDistortColor random_distort_color = 10

  • RandomJitterBoxes random_jitter_boxes = 11

  • RandomCropImage random_crop_image = 12

  • RandomPadImage random_pad_image = 13

  • RandomCropPadImage random_crop_pad_image = 14

  • RandomCropToAspectRatio random_crop_to_aspect_ratio = 15

  • RandomBlackPatches random_black_patches = 16

  • RandomResizeMethod random_resize_method = 17

  • ScaleBoxesToPixelCoordinates scale_boxes_to_pixel_coordinates = 18

  • ResizeImage resize_image = 19

  • SubtractChannelMean subtract_channel_mean = 20

  • SSDRandomCrop ssd_random_crop = 21

  • SSDRandomCropPad ssd_random_crop_pad = 22

  • SSDRandomCropFixedAspectRatio ssd_random_crop_fixed_aspect_ratio = 23

  • SSDRandomCropPadFixedAspectRatio ssd_random_crop_pad_fixed_aspect_ratio = 24

  • RandomVerticalFlip random_vertical_flip = 25

  • RandomRotation90 random_rotation90 = 26

  • RGBtoGray rgb_to_gray = 27

Converts the RGB image to a grayscale image. This also converts the image depth from 3 to 1, unlike RandomRGBtoGray which does not change the image depth.

Used in: PreprocessingStep

(message has no fields)

Configuration message for the RMSPropOptimizer See: https://www.tensorflow.org/api_docs/python/tf/train/RMSPropOptimizer

Used in: Optimizer

• optional LearningRate learning_rate = 1

• optional float momentum_optimizer_value = 2

• optional float decay = 3

• optional float epsilon = 4

Randomly changes image brightness by up to max_delta. Image outputs will be saturated between 0 and 1.

Used in: PreprocessingStep

• optional float max_delta = 1

Randomly scales contract by a value between [min_delta, max_delta].

Used in: PreprocessingStep

• optional float min_delta = 1

• optional float max_delta = 2

Randomly alters hue by a value of up to max_delta.

Used in: PreprocessingStep

• optional float max_delta = 1

Randomly changes saturation by a value between [min_delta, max_delta].

Used in: PreprocessingStep

• optional float min_delta = 1

• optional float max_delta = 2

Randomly adds black square patches to an image.

Used in: PreprocessingStep

• optional int32 max_black_patches = 1

  The maximum number of black patches to add.

• optional float probability = 2

  The probability of a black patch being added to an image.

• optional float size_to_image_ratio = 3

  Ratio between the dimension of the black patch to the minimum dimension of the image (patch_width = patch_height = min(image_height, image_width)).

Randomly crops the image and bounding boxes.

Used in: PreprocessingStep

• optional float min_object_covered = 1

  Cropped image must cover at least one box by this fraction.

• optional float min_aspect_ratio = 2

  Aspect ratio bounds of cropped image.

• optional float max_aspect_ratio = 3

• optional float min_area = 4

  Allowed area ratio of cropped image to original image.

• optional float max_area = 5

• optional float overlap_thresh = 6

  Minimum overlap threshold of cropped boxes to keep in new image. If the ratio between a cropped bounding box and the original is less than this value, it is removed from the new image.

• optional float random_coef = 7

  Probability of keeping the original image.

Randomly crops an image followed by a random pad.

Used in: PreprocessingStep

• optional float min_object_covered = 1

  Cropping operation must cover at least one box by this fraction.

• optional float min_aspect_ratio = 2

  Aspect ratio bounds of image after cropping operation.

• optional float max_aspect_ratio = 3

• optional float min_area = 4

  Allowed area ratio of image after cropping operation.

• optional float max_area = 5

• optional float overlap_thresh = 6

  Minimum overlap threshold of cropped boxes to keep in new image. If the ratio between a cropped bounding box and the original is less than this value, it is removed from the new image.

• optional float random_coef = 7

  Probability of keeping the original image during the crop operation.

• repeated float min_padded_size_ratio = 8

  Maximum dimensions for padded image. If unset, will use double the original image dimension as a lower bound. Both of the following fields should be length 2.

• repeated float max_padded_size_ratio = 9

• repeated float pad_color = 10

  Color of the padding. If unset, will pad using average color of the input image. This field should be of length 3.

Randomly crops an iamge to a given aspect ratio.

Used in: PreprocessingStep

• optional float aspect_ratio = 1

  Aspect ratio.

• optional float overlap_thresh = 2

  Minimum overlap threshold of cropped boxes to keep in new image. If the ratio between a cropped bounding box and the original is less than this value, it is removed from the new image.

Performs a random color distortion. color_orderings should either be 0 or 1.

Used in: PreprocessingStep

• optional int32 color_ordering = 1

Randomly horizontally flips the image and detections 50% of the time.

Used in: PreprocessingStep

• repeated int32 keypoint_flip_permutation = 1

  Specifies a mapping from the original keypoint indices to horizontally flipped indices. This is used in the event that keypoints are specified, in which case when the image is horizontally flipped the keypoints will need to be permuted. E.g. for keypoints representing left_eye, right_eye, nose_tip, mouth, left_ear, right_ear (in that order), one might specify the keypoint_flip_permutation below: keypoint_flip_permutation: 1 keypoint_flip_permutation: 0 keypoint_flip_permutation: 2 keypoint_flip_permutation: 3 keypoint_flip_permutation: 5 keypoint_flip_permutation: 4

Randomly enlarges or shrinks image (keeping aspect ratio).

Used in: PreprocessingStep

• optional float min_scale_ratio = 1

• optional float max_scale_ratio = 2

Randomly jitters corners of boxes in the image determined by ratio. ie. If a box is [100, 200] and ratio is 0.02, the corners can move by [1, 4].

Used in: PreprocessingStep

• optional float ratio = 1

Configuration proto for random normal initializer. See https://www.tensorflow.org/api_docs/python/tf/random_normal_initializer

Used in: Initializer

• optional float mean = 1

• optional float stddev = 2

Randomly adds padding to the image.

Used in: PreprocessingStep

• optional float min_image_height = 1

  Minimum dimensions for padded image. If unset, will use original image dimension as a lower bound.

• optional float min_image_width = 2

• optional float max_image_height = 3

  Maximum dimensions for padded image. If unset, will use double the original image dimension as a lower bound.

• optional float max_image_width = 4

• repeated float pad_color = 5

  Color of the padding. If unset, will pad using average color of the input image.

Randomly scales the values of all pixels in the image by some constant value between [minval, maxval], then clip the value to a range between [0, 1.0].

Used in: PreprocessingStep

• optional float minval = 1

• optional float maxval = 2

Randomly convert entire image to grey scale.

Used in: PreprocessingStep

• optional float probability = 1

Randomly resizes the image up to [target_height, target_width].

Used in: PreprocessingStep

• optional float target_height = 1

• optional float target_width = 2

Randomly rotates the image and detections by 90 degrees counter-clockwise 50% of the time.

Used in: PreprocessingStep

(message has no fields)

Randomly vertically flips the image and detections 50% of the time.

Used in: PreprocessingStep

• repeated int32 keypoint_flip_permutation = 1

  Specifies a mapping from the original keypoint indices to vertically flipped indices. This is used in the event that keypoints are specified, in which case when the image is vertically flipped the keypoints will need to be permuted. E.g. for keypoints representing left_eye, right_eye, nose_tip, mouth, left_ear, right_ear (in that order), one might specify the keypoint_flip_permutation below: keypoint_flip_permutation: 1 keypoint_flip_permutation: 0 keypoint_flip_permutation: 2 keypoint_flip_permutation: 3 keypoint_flip_permutation: 5 keypoint_flip_permutation: 4

Configuration proto for region similarity calculators. See core/region_similarity_calculator.py for details.

Used in: Ssd

• oneof region_similarity

  • NegSqDistSimilarity neg_sq_dist_similarity = 1

  • IouSimilarity iou_similarity = 2

  • IoaSimilarity ioa_similarity = 3

Proto with one-of field for regularizers.

Used in: Hyperparams

• oneof regularizer_oneof

  • L1Regularizer l1_regularizer = 1

  • L2Regularizer l2_regularizer = 2

Resizes images to [new_height, new_width].

Used in: PreprocessingStep

• optional int32 new_height = 1

• optional int32 new_width = 2

• optional ResizeImage.Method method = 3

Used in: ResizeImage

• AREA = 1

• BICUBIC = 2

• BILINEAR = 3

• NEAREST_NEIGHBOR = 4

Enumeration type for image resizing methods provided in TensorFlow.

Used in: FixedShapeResizer, KeepAspectRatioResizer

• BILINEAR = 0

  Corresponds to tf.image.ResizeMethod.BILINEAR

• NEAREST_NEIGHBOR = 1

  Corresponds to tf.image.ResizeMethod.NEAREST_NEIGHBOR

• BICUBIC = 2

  Corresponds to tf.image.ResizeMethod.BICUBIC

• AREA = 3

  Corresponds to tf.image.ResizeMethod.AREA

Used in: BoxPredictor

• optional Hyperparams conv_hyperparams = 1

  Hyperparameters for convolution ops used in the box predictor.

• optional int32 num_spatial_bins_height = 2

  Bin sizes for RFCN crops.

• optional int32 num_spatial_bins_width = 3

• optional int32 depth = 4

  Target depth to reduce the input image features to.

• optional int32 box_code_size = 5

  Size of the encoding for the boxes.

• optional int32 crop_height = 6

  Size to resize the rfcn crops to.

• optional int32 crop_width = 7

Randomly crops a image according to: Liu et al., SSD: Single shot multibox detector. This preprocessing step defines multiple SSDRandomCropOperations. Only one operation (chosen at random) is actually performed on an image.

Used in: PreprocessingStep

• repeated SSDRandomCropOperation operations = 1

Randomly crops a image to a fixed aspect ratio according to: Liu et al., SSD: Single shot multibox detector. Multiple SSDRandomCropFixedAspectRatioOperations are defined by this preprocessing step. Only one operation (chosen at random) is actually performed on an image.

Used in: PreprocessingStep

• repeated SSDRandomCropFixedAspectRatioOperation operations = 1

• optional float aspect_ratio = 2

  Aspect ratio to crop to. This value is used for all crop operations.

Used in: SSDRandomCropFixedAspectRatio

• optional float min_object_covered = 1

  Cropped image must cover at least this fraction of one original bounding box.

• optional float min_area = 4

  The area of the cropped image must be within the range of [min_area, max_area].

• optional float max_area = 5

• optional float overlap_thresh = 6

  Cropped box area ratio must be above this threhold to be kept.

• optional float random_coef = 7

  Probability a crop operation is skipped.

Used in: SSDRandomCrop

• optional float min_object_covered = 1

  Cropped image must cover at least this fraction of one original bounding box.

• optional float min_aspect_ratio = 2

  The aspect ratio of the cropped image must be within the range of [min_aspect_ratio, max_aspect_ratio].

• optional float max_aspect_ratio = 3

• optional float min_area = 4

  The area of the cropped image must be within the range of [min_area, max_area].

• optional float max_area = 5

• optional float overlap_thresh = 6

  Cropped box area ratio must be above this threhold to be kept.

• optional float random_coef = 7

  Probability a crop operation is skipped.

Randomly crops and pads an image according to: Liu et al., SSD: Single shot multibox detector. This preprocessing step defines multiple SSDRandomCropPadOperations. Only one operation (chosen at random) is actually performed on an image.

Used in: PreprocessingStep

• repeated SSDRandomCropPadOperation operations = 1

Randomly crops and pads an image to a fixed aspect ratio according to: Liu et al., SSD: Single shot multibox detector. Multiple SSDRandomCropPadFixedAspectRatioOperations are defined by this preprocessing step. Only one operation (chosen at random) is actually performed on an image.

Used in: PreprocessingStep

• repeated SSDRandomCropPadFixedAspectRatioOperation operations = 1

• optional float aspect_ratio = 2

  Aspect ratio to pad to. This value is used for all crop and pad operations.

• repeated float min_padded_size_ratio = 3

  Min ratio of padded image height and width to the input image's height and width. Two entries per operation.

• repeated float max_padded_size_ratio = 4

  Max ratio of padded image height and width to the input image's height and width. Two entries per operation.

Used in: SSDRandomCropPadFixedAspectRatio

• optional float min_object_covered = 1

  Cropped image must cover at least this fraction of one original bounding box.

• optional float min_aspect_ratio = 2

  The aspect ratio of the cropped image must be within the range of [min_aspect_ratio, max_aspect_ratio].

• optional float max_aspect_ratio = 3

• optional float min_area = 4

  The area of the cropped image must be within the range of [min_area, max_area].

• optional float max_area = 5

• optional float overlap_thresh = 6

  Cropped box area ratio must be above this threhold to be kept.

• optional float random_coef = 7

  Probability a crop operation is skipped.

Used in: SSDRandomCropPad

• optional float min_object_covered = 1

  Cropped image must cover at least this fraction of one original bounding box.

• optional float min_aspect_ratio = 2

  The aspect ratio of the cropped image must be within the range of [min_aspect_ratio, max_aspect_ratio].

• optional float max_aspect_ratio = 3

• optional float min_area = 4

  The area of the cropped image must be within the range of [min_area, max_area].

• optional float max_area = 5

• optional float overlap_thresh = 6

  Cropped box area ratio must be above this threhold to be kept.

• optional float random_coef = 7

  Probability a crop operation is skipped.

• repeated float min_padded_size_ratio = 8

  Min ratio of padded image height and width to the input image's height and width. Two entries per operation.

• repeated float max_padded_size_ratio = 9

  Max ratio of padded image height and width to the input image's height and width. Two entries per operation.

• optional float pad_color_r = 10

  Padding color.

• optional float pad_color_g = 11

• optional float pad_color_b = 12

Scales boxes from normalized coordinates to pixel coordinates.

Used in: PreprocessingStep

(message has no fields)

Sigmoid Focal cross entropy loss as described in https://arxiv.org/abs/1708.02002

Used in: ClassificationLoss

• optional bool anchorwise_output = 1

  DEPRECATED, do not use.

• optional float gamma = 2

  modulating factor for the loss.

• optional float alpha = 3

  alpha weighting factor for the loss.

Configuration proto for SquareBoxCoder. See box_coders/square_box_coder.py for details.

Used in: BoxCoder

• optional float y_scale = 1

  Scale factor for anchor encoded box center.

• optional float x_scale = 2

• optional float length_scale = 3

  Scale factor for anchor encoded box length.

Configuration for Single Shot Detection (SSD) models.

Used in: DetectionModel

• optional int32 num_classes = 1

  Number of classes to predict.

• optional ImageResizer image_resizer = 2

  Image resizer for preprocessing the input image.

• optional SsdFeatureExtractor feature_extractor = 3

  Feature extractor config.

• optional BoxCoder box_coder = 4

  Box coder to encode the boxes.

• optional Matcher matcher = 5

  Matcher to match groundtruth with anchors.

• optional RegionSimilarityCalculator similarity_calculator = 6

  Region similarity calculator to compute similarity of boxes.

• optional bool encode_background_as_zeros = 12

  Whether background targets are to be encoded as an all zeros vector or a one-hot vector (where background is the 0th class).

• optional float negative_class_weight = 13

  classification weight to be associated to negative anchors (default: 1.0). The weight must be in [0., 1.].

• optional BoxPredictor box_predictor = 7

  Box predictor to attach to the features.

• optional AnchorGenerator anchor_generator = 8

  Anchor generator to compute anchors.

• optional PostProcessing post_processing = 9

  Post processing to apply on the predictions.

• optional bool normalize_loss_by_num_matches = 10

  Whether to normalize the loss by number of groundtruth boxes that match to the anchors.

• optional bool normalize_loc_loss_by_codesize = 14

  Whether to normalize the localization loss by the code size of the box encodings. This is applied along with other normalization factors.

• optional Loss loss = 11

  Loss configuration for training.

Configuration proto for SSD anchor generator described in https://arxiv.org/abs/1512.02325. See anchor_generators/multiple_grid_anchor_generator.py for details.

Used in: AnchorGenerator

• optional int32 num_layers = 1

  Number of grid layers to create anchors for.

• optional float min_scale = 2

  Scale of anchors corresponding to finest resolution.

• optional float max_scale = 3

  Scale of anchors corresponding to coarsest resolution

• repeated float scales = 12

  Can be used to override min_scale->max_scale, with an explicitly defined set of scales. If empty, then min_scale->max_scale is used.

• repeated float aspect_ratios = 4

  Aspect ratios for anchors at each grid point.

• optional float interpolated_scale_aspect_ratio = 13

  When this aspect ratio is greater than 0, then an additional anchor, with an interpolated scale is added with this aspect ratio.

• optional bool reduce_boxes_in_lowest_layer = 5

  Whether to use the following aspect ratio and scale combination for the layer with the finest resolution : (scale=0.1, aspect_ratio=1.0), (scale=min_scale, aspect_ration=2.0), (scale=min_scale, aspect_ratio=0.5).

• optional float base_anchor_height = 6

  The base anchor size in height dimension.

• optional float base_anchor_width = 7

  The base anchor size in width dimension.

• repeated int32 height_stride = 8

  Anchor stride in height dimension in pixels for each layer. The length of this field is expected to be equal to the value of num_layers.

• repeated int32 width_stride = 9

  Anchor stride in width dimension in pixels for each layer. The length of this field is expected to be equal to the value of num_layers.

• repeated int32 height_offset = 10

  Anchor height offset in pixels for each layer. The length of this field is expected to be equal to the value of num_layers.

• repeated int32 width_offset = 11

  Anchor width offset in pixels for each layer. The length of this field is expected to be equal to the value of num_layers.

Used in: Ssd

• optional string type = 1

  Type of ssd feature extractor.

• optional float depth_multiplier = 2

  The factor to alter the depth of the channels in the feature extractor.

• optional int32 min_depth = 3

  Minimum number of the channels in the feature extractor.

• optional Hyperparams conv_hyperparams = 4

  Hyperparameters for the feature extractor.

• optional int32 pad_to_multiple = 5

  The nearest multiple to zero-pad the input height and width dimensions to. For example, if pad_to_multiple = 2, input dimensions are zero-padded until the resulting dimensions are even.

• optional bool batch_norm_trainable = 6

  Whether to update batch norm parameters during training or not. When training with a relative small batch size (e.g. 1), it is desirable to disable batch norm update and use pretrained batch norm params. Note: Some feature extractors are used with canned arg_scopes (e.g resnet arg scopes). In these cases training behavior of batch norm variables may depend on both values of `batch_norm_trainable` and `is_training`. When canned arg_scopes are used with feature extractors `conv_hyperparams` will apply only to the additional layers that are added and are outside the canned arg_scope.

• optional bool use_explicit_padding = 7

  Whether to use explicit padding when extracting SSD multiresolution features. Note that this does not apply to the base feature extractor.

• optional bool use_depthwise = 8

  Whether to use depthwise separable convolutions for to extract additional feature maps added by SSD.

• repeated StringIntLabelMapItem item = 1

Used in: StringIntLabelMap

• optional string name = 1

  String name. The most common practice is to set this to a MID or synsets id.

• optional int32 id = 2

  Integer id that maps to the string name above. Label ids should start from 1.

• optional string display_name = 3

  Human readable string label.

Normalizes an image by subtracting a mean from each channel.

Used in: PreprocessingStep

• repeated float means = 1

  The mean to subtract from each channel. Should be of same dimension of channels in the input image.

An input reader that reads TF Example protos from local TFRecord files.

Used in: InputReader

• repeated string input_path = 1

  Path(s) to `TFRecordFile`s.

Message for configuring DetectionModel training jobs (train.py).

Used in: TrainEvalPipelineConfig

• optional uint32 batch_size = 1

  Input queue batch size.

• repeated PreprocessingStep data_augmentation_options = 2

  Data augmentation options.

• optional bool sync_replicas = 3

  Whether to synchronize replicas during training.

• optional uint32 keep_checkpoint_every_n_hours = 4

  How frequently to keep checkpoints.

• optional Optimizer optimizer = 5

  Optimizer used to train the DetectionModel.

• optional float gradient_clipping_by_norm = 6

  If greater than 0, clips gradients by this value.

• optional string fine_tune_checkpoint = 7

  Checkpoint to restore variables from. Typically used to load feature extractor variables trained outside of object detection.

• optional bool from_detection_checkpoint = 8

  Specifies if the finetune checkpoint is from an object detection model. If from an object detection model, the model being trained should have the same parameters with the exception of the num_classes parameter. If false, it assumes the checkpoint was a object classification model.

• optional bool load_all_detection_checkpoint_vars = 19

  Whether to load all checkpoint vars that match model variable names and sizes. This option is only available if `from_detection_checkpoint` is True.

• optional uint32 num_steps = 9

  Number of steps to train the DetectionModel for. If 0, will train the model indefinitely.

• optional float startup_delay_steps = 10

  Number of training steps between replica startup. This flag must be set to 0 if sync_replicas is set to true.

• optional float bias_grad_multiplier = 11

  If greater than 0, multiplies the gradient of bias variables by this amount.

• repeated string freeze_variables = 12

  Variables that should not be updated during training.

• optional int32 replicas_to_aggregate = 13

  Number of replicas to aggregate before making parameter updates.

• optional int32 batch_queue_capacity = 14

  Maximum number of elements to store within a queue.

• optional int32 num_batch_queue_threads = 15

  Number of threads to use for batching.

• optional int32 prefetch_queue_capacity = 16

  Maximum capacity of the queue used to prefetch assembled batches.

• optional bool merge_multiple_label_boxes = 17

  If true, boxes with the same coordinates will be merged together. This is useful when each box can have multiple labels. Note that only Sigmoid classification losses should be used.

• optional bool add_regularization_loss = 18

  Whether to add regularization loss to `total_loss`. This is true by default and adds all regularization losses defined in the model to `total_loss`. Setting this option to false is very useful while debugging the model and losses.

• optional int32 max_number_of_boxes = 20

  Maximum number of boxes used during training. Set this to at least the maximum amount of boxes in the input data. Otherwise, it may cause "Data loss: Attempted to pad to a smaller size than the input element" errors.

• optional bool unpad_groundtruth_tensors = 21

  Whether to remove padding along `num_boxes` dimension of the groundtruth tensors.

Convenience message for configuring a training and eval pipeline. Allows all of the pipeline parameters to be configured from one file.

• optional DetectionModel model = 1

• optional TrainConfig train_config = 2

• optional InputReader train_input_reader = 3

• optional EvalConfig eval_config = 4

• optional InputReader eval_input_reader = 5

Configuration proto for truncated normal initializer. See https://www.tensorflow.org/api_docs/python/tf/truncated_normal_initializer

Used in: Initializer

• optional float mean = 1

• optional float stddev = 2

Configuration proto for variance scaling initializer. See https://www.tensorflow.org/api_docs/python/tf/contrib/layers/ variance_scaling_initializer

Used in: Initializer

• optional float factor = 1

• optional bool uniform = 2

• optional VarianceScalingInitializer.Mode mode = 3

Used in: VarianceScalingInitializer

• FAN_IN = 0

• FAN_OUT = 1

• FAN_AVG = 2

Configuration proto for weight shared convolutional box predictor.

Used in: BoxPredictor

• optional Hyperparams conv_hyperparams = 1

  Hyperparameters for convolution ops used in the box predictor.

• optional int32 num_layers_before_predictor = 4

  Number of the additional conv layers before the predictor.

• optional int32 depth = 2

  Output depth for the convolution ops prior to predicting box encodings and class predictions.

• optional int32 kernel_size = 7

  Size of final convolution kernel. If the spatial resolution of the feature map is smaller than the kernel size, then the kernel size is set to min(feature_width, feature_height).

• optional int32 box_code_size = 8

  Size of the encoding for boxes.

• optional float class_prediction_bias_init = 10

  Bias initialization for class prediction. It has been show to stabilize training where there are large number of negative boxes. See https://arxiv.org/abs/1708.02002 for details.

Intersection over union location loss: 1 - IOU

Used in: LocalizationLoss

(message has no fields)

L2 location loss: 0.5 * ||weight * (a - b)|| ^ 2

Used in: LocalizationLoss

• optional bool anchorwise_output = 1

  DEPRECATED, do not use. Output loss per anchor.

Classification loss using a sigmoid function over class predictions.

Used in: ClassificationLoss

• optional bool anchorwise_output = 1

  DEPRECATED, do not use. Output loss per anchor.

SmoothL1 (Huber) location loss. The smooth L1_loss is defined elementwise as .5 x^2 if |x| <= delta and 0.5 x^2 + delta * (|x|-delta) otherwise, where x is the difference between predictions and target.

Used in: LocalizationLoss

• optional bool anchorwise_output = 1

  DEPRECATED, do not use. Output loss per anchor.

• optional float delta = 2

  Delta value for huber loss.

Classification loss using a softmax function over class predictions.

Used in: ClassificationLoss

• optional bool anchorwise_output = 1

  DEPRECATED, do not use. Output loss per anchor.

• optional float logit_scale = 2

  Scale logit (input) value before calculating softmax classification loss. Typically used for softmax distillation.