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Use the Levels Adjustment Tool in digiKam

Jan 20, 2011, 17:05 (0 Talkback[s])
(Other stories by Dmitri Popov)

"When it comes to tweaking photos, Levels is the most important weapon in digiKam's arsenal. This tool lets you adjust brightness and contrast by specifying the location of complete black, complete white, and midtones in a histogram, which makes it a perfect tool for fixing under- and overexposed photos as well as improving the overall tonal range of a photo.

"You can access the Levels tool in the image editor by choosing Color | Levels Adjust. Select Luminosity from the Channel drop-down list, and press the Linear button.

"The key element in the Levels Adjust pane is the histogram with the black point and white point sliders. Simply put, the black point slider controls shadows, while the white point slider controls highlights. So to darken shadow areas in the photo, move the black point slider to the right. Need to boost highlights? Move the white point slider to the left."

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