The main goal of my first part of the Google Summer of Code program is to create image manipulation tools. I started programming them after I finished the histogram. I've added the Qt Dock Widget, which will contain different image manipulation tool widgets.
The widgets I've added so far are three sliders for changing the brightness, contrast and saturation of the opened image. The picture bellow shows the current look of the added widgets.
Let's also take a look at the changes we get with different slider values of brightness, contrast and saturation.
Brightness from -100 to 100, step 20:
Contrast from -100 to 100, step 20:
Saturation from -255 to 255, step 25.5: