Invert colors when plotting a PNG file using matplotlib

Question

I\'m trying to display a PNG file using matplotlib and of course, python. For this test, I\'ve generated the following image:

Answer 1

It appears that you may somehow have RGB switched with BGR. Notice that your greens are retained but all the blues turned to red. If cube has shape (M,N,3), try swapping cube[:,:,0] with cube[:,:,2]. You can do that with numpy like so:

rgb = numpy.fliplr(cube.reshape(-1,3)).reshape(cube.shape)

From the OpenCV documentation:

Note: In the case of color images, the decoded images will have the channels stored in B G R order.