cv2error OpenCV342 CMiniconda3conda-bldopencv-suite_1534379934306workmoduleshighguisrcwindowcpp356 error -215Assertion failed sizewidth0 && sizeheight0 in function cvimshow

This error is caused by the imshow function in OpenCV. It occurs when the width and height of the image being displayed are either zero or negative. To fix this error, you need to make sure that the image size is valid and greater than zero. You can check the size of the image using the shape attribute of the numpy array, and make sure it is not empty or negative.