Python to c++ non-continuous image issue

[Michal]

Hello, I have been running into this issue, not sure if I am doing something wrong, or misunderstood the capabilities of your libraries.

on python side following is run:

img2 = cv2.imread('testImg.png',cv2.IMREAD_COLOR)
img3Test = img2[:,:,1]
detector2.showImage(img3Test)

On c++ side this is run

.def("showImage", &PYARobustChessboardDetector::showImage)

void showImage(cv::Mat mat) {
        cv::imshow("Mat", mat);
        cv::waitKey(0);
        cv::destroyAllWindows();
    }

and imshow shows this

if I enforce continuousness
res4 = detector2.processImage(np.ascontiguousarray(img3Test))
It is as expected

I assume your libraries are properly linked, as I would expect error be thrown when I try to load Mat from python, without support.

Though to be fair as I write this, you claim continuous data support, not contiguous so this issue may be outside of the scope of the project.

[Pascal Thomet]

Hi,
You are right, non contiguous support is out of the scope of the library.
However, I just added an exception, with a nice error message: c1622d6

Could you please try it and tell me if it does work also on your side?

[Michal]

Shame :)
The code compiled and exception worked once I added the missing namespace in front of ssize_t. See pull request, where I added it.