_BASE_: [ '../datasets/coco_detection.yml', '../runtime.yml', '_base_/retinanet_r50_fpn.yml', '_base_/optimizer_2x.yml', '_base_/retinanet_reader.yml' ] weights: output/retinanet_r101_fpn_2x_coco/model_final pretrain_weights: https://paddledet.bj.bcebos.com/models/pretrained/ResNet101_pretrained.pdparams ResNet: depth: 101 variant: b norm_type: bn freeze_at: 0 return_idx: [1, 2, 3] num_stages: 4