python /data6/zhangw/yolov5_birdproject/detect_and_crop_by_class.py \
    --weights /data6/zhangw/yolov5_birdproject/runs/train/YNDC_20251010_yolov5_optimize/weights/best.pt \
    --source /data6/zhangw/ZW_python_funtion/ZJLY_neg_nolabeled_images \
    --output-dir /data6/zhangw/ZW_python_funtion/ZJLY_neg_nolabeled_images_croped \
    --imgsz 640 \
    --conf-thres 0.25 \
    --iou-thres 0.45 \
    --device 4 \
    --class-num 5