[mod Request] lightening up images as thumbnail is created

[nappa98]

Is it possible to increase the brightness of the image when the thumbnail is being made ?

Some of the images look fine as big pictures, but when you make thumbnails  - sometimes they come out a bit darker than you like. It's especially true if there is massive ammounts of white space.

NAPPA

Edited:
http://www.4homepages.de/forum/viewtopic.php?p=24809&highlight=#24809 <--- If possible, I woud like for this mod to also work with this one.