If the layer is completely opaque or completely transparent, the histogram will consist of a single bar on the left or right edge.Ĭolors: shows the Red, Green, and Blue histograms superposed, so that you can see all of the color distribution information in a single view. Red, Green, Blue: show the distribution of intensity levels for the Red, Green, or Blue channels respectively.Īlpha: shows the distribution of opacity levels. Luminosity: shows the distribution of brightness values. The Histogram Viewer allows you to view each channel separately: A transparent pixel is encoded by 0 on the alpha channel an opaque pixel by 255. Thus, a black pixel is encoded by 0 on all color channels a white pixel by 255 on all color channels. Each channel supports a range of intensity levels from 0 to 255 (integer valued). Alpha channel is a Layer in the image that supports transparency (like PNG or GIF images). If you want to perform a histogram based color correction, use for example Color Balance, Levels Adjust or Curves Adjust in the Image Editor.Īn image can be decomposed into Red, Green and Blue color channels.
It is purely informational: nothing you do with it will cause any change to the image.
The Histogram Viewer shows the statistical distribution of color values in the current image. If your photograph has a color cast you might be able to see what is wrong by looking at the histogram. The histogram for an image shows the amount of each color that is present and their different amplitudes within the image.
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