Well, my image is 16-bit. I have tried to make my own adjustings. It works, but my problem is that it is very slow. (Uses aprox. 2 seconds per image with brightness adjusting, replacing every pixel in the image with a new value. (On a P3-800, 128MB)) I wanted a slider and an imediatly respons. (As in the BCG-example) Converting the image to 8 bit was not a good idea either.
Thanx anyway.