Documentation | Help File | Pixel | Section | Grid

Raster dialog box, Pixel tab.

Pixel tab

• Red - defines how much the red color is reduced/amplified with respect to the original value for each pixel; can vary from -100 to 100, where -100 means that the red color is completely reduced and 100 that the red color is fully amplified,
• Green - defines how much the green color is reduced/amplified with respect to the original value for each pixel; can vary from -100 to 100, where -100 means that the green color is completely reduced and 100 that the green color is fully amplified,
• Blue - defines how much the blue color is reduced/amplified with respect to the original value for each pixel; can vary from -100 to 100, where -100 means that the blue color is completely reduced and 100 that the blue color is fully amplified,
• Brightness - defines how much all colors are reduced/amplified with respect to the original value for each pixel; can vary from -100 to 100, where -100 turns the layer black and 100 turns the layer white,
• Contrast - defines how much each color is reduced or amplified with respect to the original value for each pixel; for values from -100 to 0 the color is reduced if its original intensity is above the average and is amplified if its original intensity is below the average; for values from 0 to 100 the color is reduced if its original intensity is below the average and is amplified if its original intensity is above the average,
• Red, Green, Blue and Alpha band - allow to mix, turn off or change order of the bands which normally correspond to three primary colors and transparency; by default the first band is the red color, the second band is the green color, the third band is the blue color and the fourth band plays the role transparency; for example, to exchange the red color with the blue color and turn off transparency: Red band = 3, Green band = 2, Blue band = 1, Alpha band = off,
• Inversion - if checked, the layer is displayed as a negative,
• Grayscale - if checked, the layer is displayed in grayscale,
• Histogram - if checked, the image is enhanced with the usage of histogram,
• Reset button - restores the default settings on the Pixel tab.