The Stretch Contrast. Like „Stretch Contrast“, however, there may be hue shifts in the resulting image.
command automatically adjusts the colors of the active layer by stretching the Red, Green and Blue channels separately. To do this, it discards pixel colors at each end of the Red, Green and Blue histograms which are used by only 0.05% of the pixels in the image and stretches the remaining range as much as possible. The result is that pixel colors which occur very infrequently at the outer edges of the histograms (perhaps bits of dust, etc.) do not negatively influence the minimum and maximum values used for stretching the histograms, in comparison withŠi komanda tinka paveikslėliams, kuriuose yra nešvari balta arba juoda spalvos. Kadangi ji paprastai sukuria gryną baltą (arba juodą), ji gali būti naudinga, pvz., norint pagerinti nuotraukas.
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This command only works on RGB images. If the image is Grayscale or Indexed, the menu entry is disabled. |