[TYPO3] Scale and crop image

[Redvald Hjulstad]

Hi list!
I want TYPO3 to crop and _resize a image so it becomes quadratic with 
w=h=100px. Say the image originally is w=800 and h=600. Then I wan´t 
TYPO3 to cut downscale it and cut in the left and right side so it 
becomes quadratic width and height = 100px.

If the original image has height bigger then width it must scale down 
and cut in the bottom and the top.

Is this possible, and how do I do it?

Redvald