Created by: zimoqingfeng

同学您好，我在配置文件yolov3_r50vd_dcn_db_iouloss_obj365_pretrained_coco.yml中修改了anchor size的设置，尝试用自己在数据集上聚类的anchor结果进行训练，但是map不增反降。请问可能是什么原因呢。。

优化前anchor设置：

YOLOv3Head: anchor_masks: [[6, 7, 8], [3, 4, 5], [0, 1, 2]] anchors: [[10, 13], [16, 30], [33, 23], [30, 61], [62, 45], [59, 119], [116, 90], [156, 198], [373, 326]] norm_decay: 0. yolo_loss: YOLOv3Loss nms: background_label: -1 keep_top_k: 100 nms_threshold: 0.45 nms_top_k: 1000 normalized: false score_threshold: 0.01 drop_block: true

优化后anchor设置： YOLOv3Head: anchor_masks: [[6, 7, 8], [3, 4, 5], [0, 1, 2]] anchors: [[18, 22], [30, 34], [40, 54], [66, 97], [69, 55], [97, 165], [143, 100], [159, 273], [297, 147]] norm_decay: 0. yolo_loss: YOLOv3Loss nms: background_label: -1 keep_top_k: 100 nms_threshold: 0.45 nms_top_k: 1000 normalized: false score_threshold: 0.01 drop_block: true

辛苦啦