Editing NumPy (section)

=== Incorporation with OpenCV ===
<syntaxhighlight lang="numpy">
>>> import numpy as np
>>> import cv2
>>> r = np.reshape(np.arange(256*256)%256,(256,256))  # 256x256 pixel array with a horizontal gradient from 0 to 255 for the red color channel
>>> g = np.zeros_like(r)  # array of same size and type as r but filled with 0s for the green color channel
>>> b = r.T  # transposed r will give a vertical gradient for the blue color channel
>>> cv2.imwrite("gradients.png", np.dstack([b,g,r]))  # OpenCV images are interpreted as BGR, the depth-stacked array will be written to an 8bit RGB PNG-file called "gradients.png"
True
</syntaxhighlight>