Cross Derivative Filters

A cross derivative filter has a response proportional to

2 x 2 cross filter

original image	cross2 image

3 x 3 cross filter

original image	cross3 image

3 x 3 diff filter

The diff filter is closely related to the cross filter. The cross filter responds to edges at 45 and -45 degrees. The diff filter responds to edges at 0 and 90 degrees.

original image	diff3 image

Maintained by John Loomis, last updated 19 June 1997