classes, scores, boxes = model.detect(frames, conf_thd, nms_thd) 其中model这个是来自： `net = cv2.dnn.readNetFromDarknet(CONFIG_FILE, WEIGHT_FILE) # 读取权重与配置文件` `net.setPreferableBackend(cv2.dnn.DNN_BACKEND_CUDA)` `net.setPreferableTarget(cv2.dnn.DNN_TARGET_CUDA)` `model = cv2.dnn_DetectionModel(net)` `model.setInputParams(size=(side_width, side_height), scale=1/255, swapRB=True)`