Apply a filter to make a color embossed image in C#

This example extends the earlier one Pixellate an image and create other effects in C# by adding a new filter that makes a color embossed image without removing most of the color information.


The filter’s kernel is:

1  1 -1
1  1 -1
1 -1 -1

The filter divides the result by 1 and uses no offset so it retains most of the image’s color information. See the earlier post Use image filters to perform edge detection, smoothing, embossing, and more in C# for more information about how kernels work.