cv2.findContours

Layout of the output array image is incompatible with cv::Mat (step[ndims-1] != elemsize or step[1] != elemsize*nchannels)

解决办法：

1. copy of original array   

    image=image.copy()

2.数组可能不连续，那就使他连续：

image = np.ascontiguousarray(image, dtype=np.uint8)