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mscoco-retinanet-resnet50-640x640-30x-256.json
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mscoco-retinanet-resnet50-640x640-30x-256.json
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{
"experiment": {
"name": "mscoco-retinanet-resnet50-640x640-30x-256",
"run_mode": "train",
"model_dir": "gs://tfrc_datasets/model_files",
"tensorboard_dir": "gs://tfrc_datasets/tensorboard"
},
"input": {
"input_shape": [
640,
640
],
"channels": 3
},
"floatx": {
"precision": "mixed_bfloat16"
},
"architecture": {
"conv_2d": {
"use_seperable_conv": false,
"use_bias_before_bn": false
},
"batch_norm": {
"use_sync": true,
"momentum": 0.99,
"epsilon": 0.001
},
"activation": {
"type": "relu6"
},
"backbone": {
"type": "resnet",
"depth": 50,
"checkpoint": ""
},
"feature_fusion": {
"type": "fpn",
"use_balanced_features": false,
"fusion_mode": "sum",
"filters": 256,
"min_level": 3,
"max_level": 7,
"backbone_max_level": 5
},
"head": {
"num_convs": 4,
"filters": 256,
"num_classes": 80,
"num_anchors": 9
},
"auxillary_head": {
"use_auxillary_head": false,
"num_convs": 2,
"filters": 256
}
},
"loss": {
"focal_loss": {
"alpha": 0.25,
"gamma": 1.5,
"label_smoothing": 0.0
},
"smooth_l1_loss": {
"delta": 0.1
},
"normalizer": {
"use_moving_average": false,
"momentum": 0.99
},
"class_loss_weight": 1.0,
"box_loss_weight": 50.0,
"auxillary_loss_weight": 0.0
},
"training": {
"use_weight_decay": true,
"weight_decay_alpha": 0.0001,
"batch_size": {
"train": 256,
"val": 8
},
"strategy": {
"type": "tpu",
"name": "v3-32"
},
"restore_checkpoint": true,
"freeze_variables": [],
"train_steps": 168750,
"validation_samples": 4952,
"validation_freq": -1,
"annotation_file_path": "./instances_val2017.json",
"remap_class_ids": true,
"steps_per_execution": 128,
"save_every": 2560,
"recovery": {
"use_inflection_detector": true,
"metric_key": "l2-regularization",
"threshold": 0.05,
"max_trials": 10
},
"optimizer": {
"name": "sgd",
"momentum": 0.9,
"nesterov": false,
"clipnorm": 10.0,
"use_moving_average": false,
"moving_average_decay": 0.9998,
"lr_params": {
"schedule_type": "piecewise_constant_decay",
"warmup_learning_rate": 0.0067,
"warmup_steps": 2000,
"values": [
0.32,
0.032,
0.0032
],
"boundaries": [
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]
}
}
},
"fine_tuning": {
"fine_tune": false,
"pretrained_checkpoint": ""
},
"anchor_params": {
"areas": [
1024.0,
4096.0,
16384.0,
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],
"aspect_ratios": [
0.5,
1.0,
2.0
],
"scales": [
1,
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]
},
"encoder_params": {
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"ignore_iou": 0.5,
"box_variance": [
0.1,
0.1,
0.2,
0.2
],
"scale_box_targets": false
},
"dataloader_params": {
"tfrecords": {
"train": "gs://tfrc_datasets/coco_remapped_tfrecords/train*",
"val": "gs://tfrc_datasets/coco_remapped_tfrecords/val*"
},
"augmentations": {
"use_augmentation": true,
"horizontal_flip": true,
"scale_jitter": {
"min_scale": 0.1,
"max_scale": 2.0
}
},
"preprocessing": {
"mean": [
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127.0
],
"stddev": [
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128.0,
128.0
],
"pixel_scale": 1.0
},
"shuffle_buffer_size": 1024
},
"inference": {
"batch_size": 1,
"mode": "PerClassHardNMS",
"iou_threshold": 0.5,
"score_threshold": 0.05,
"soft_nms_sigma": 0.5,
"pre_nms_top_k": 5000,
"filter_per_class": true,
"max_detections": 100
}
}