用mmdeploy生成的engine进行模型推理时，给模型一张cv2.imread(img)导入的图片，报这个错

用mmdeploy生成的engine进行模型推理时，给模型一张cv2.imread(img)导入的图片，报这个错

info.ndim = 2
Traceback (most recent call last):
  File "", line 1, in 
RuntimeError: continuous uint8 HWC array expected