The next code snippet shows how to detect corner points in an image using the Harris Corner Detector with the corner_harris() function from the scikit-image feature module:

image = imread('../images/chess_football.png') # RGB image
image_gray = rgb2gray(image)
coordinates = corner_harris(image_gray, k =0.001)
image[coordinates>0.01*coordinates.max()]=[255,0,0,255]
pylab.figure(figsize=(20,10))
pylab.imshow(image), pylab.axis('off'), pylab.show()

The next screenshot shows the output of the code, with the corners detected as red points: