image_boundary, a Python code which selects and displays the boundary edges in an image.
The information on this web page is distributed under the MIT license.
image_boundary is available in a MATLAB version and an Octave version and a Python version.
image_edge, a Python code which demonstrates a simple technique for edge detection in an image.
image_rgb_to_gray, a Python code which creates a grayscale version of an RGB image.