High Pass Filter for image processing in python by using scipy/numpy

Question

I am currently studying image processing. In Scipy, I know there is one median filter in Scipy.signal. Can anyone tell me if there is one filter similar to high pass filter?

Answer 1

One simple high-pass filter is:

-1 -1 -1
-1  8 -1
-1 -1 -1

The Sobel operator is another simple example.

In image processing these sorts of filters are often called "edge-detectors" - the Wikipedia page was OK on this last time I checked.