Remove white edges from image C#

Question

I am looking for a way to detect and crop a image in scan I am receiving. The picture is a form that gets scanned as a result it also contains the white background of scan cover.

Any suggestions how I could do that automatically?

Answer 1

There is an algorithm (with examples) for use in just this scanning situation:

https://github.com/rajbot/autocrop

It is not c# but it should be simple to migrate much of it without significant difficulty.

There is also a simpler algorithm which may fit your needs written in VB for .net here:

http://www.planet-source-code.com/vb/scripts/ShowCode.asp?txtCodeId=1755&lngWId=10