error to call opencv

[longqian95]

The following simple code has error:

ERROR: PyError (:PyObject_Call) <type 'exceptions.TypeError'>
TypeError('Layout of the output array image is incompatible with cv::Mat (step[ndims-1] != elemsize or step[1] != elemsize*nchannels)',)

using PyCall
@pyimport cv2
cv2.findContours(rand(UInt8,64,64),cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE)

But the corresponding python code has no problem:

import cv2
cv2.findContours(array(randint(0,255,(64,64)),uint8),cv2.RETR_EXTERNAL,cv2.CHAIN_APPROX_SIMPLE)

Julia: 0.4.3
PyCall: master
python: 2.7
opencv: 2.4.x
os: ubuntu 14.04

[stevengj]

It sounds like OpenCV is expecting an array row-major order, whereas Julia's array is in column-major order. This needs something like #85, it seems like.

[stevengj]

Fixed by #265

[longqian95]

Thanks. Now cv2.findContours(PyReverseDims(rand(UInt8,64,64)), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE) works.