Added color correction curves to my image processing application


(image upload site scaled the image even though I checked the "don't scale" option )

Now the app has most of the features that I want: dither, blur, blur with threshold, sharpen, the curve stuff above and a somewhat advanced HDR filter including (local) level-, contrast- and saturation-correction.

Really happy with the outcome so far. The code, however, is all over the place. Ignoring the large interface framework, it's a 3000-lines-mess all in one file which makes navigating the code super annoying