Brightness

This tab offers you a full set of controls to adjust the colors of your image. Please note that most sliders produce non-linear effects. That enables you to apply very strong effects without visual degradation of the image.

Please note that some slow filters are ignored on this tab for faster preview (Noise reduction, Sharpening, Chromatic aberration, Retouching).

To apply all filters and see the final result please switch to the Save tab. If you like the result, you can save it and process the next image. If you don't, you can always switch back to the filter, fine tune the settings and get updated result.

The program remembers the settings for each file you processed. So when you open the file again, the program recalls the most recent settings for this file. You can also save the file settings manually (Menu->Settings->File Settings).

About histograms: For better understanding how each control works, please look at the histogram on the brightness equalizer. Histogram shows distribution of pixels by luminosity. The histogram can be represented by 256 columns. For example, column #0 on the left shows the number of pixels with luminosity 0. Column #255 on the right shows the number of pixels with luminosity 255. If you see a "hill" on the left edge of the histogram, it means that there are a lot of pixels with low luminosity and the image is underexposed.

A well balanced image usually takes the full dynamic range (i.e. the histogram is stretched to limits) and the histogram is fairly symmetric.

Underexposed (dark) image	Overexposed (bright) image
Balanced (normal) image

Controls The Load settings select box lets you choose one of the predefined settings for this tab. You can also save your current settings for future use. The Contrast moves pixels from the center (>0) or to the center(<0) of the dynamic range.   Original image Contrast (+50) applied   The S-curve on the histogram means that the central part is stretched and the corners (highlights and shadows) are compressed. Please note that unlike contrast control behavior in other programs, no information is lost by pushing pixel values beyond the dynamic range (0-255). The Gamma "stretches" the histogram in the shadows which makes dark pixels brighter, and compresses the highlights. Or vice versa. Original image Gamma (+20) applied     The curve on the histogram shows that the left (dark) part is stretched to the right and the highlights are compressed. Please note that no information is lost by pushing pixel values beyond the dynamic range (0-255). The Exposure makes all pixels brighter or darker by the same degree. The effect is similar to changing the ISO, exposure time or aperture on your camera. The histogram for the original (upper) and the resulting (lower) images.