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Grayscale filter

This mode uses up to 256 shades of gray. Every pixel of a grayscale image has a brightness value ranging from 0 (black) to 255 (white). Grayscale values can also be measured as percentages of black ink coverage (0% is equal to white, 100% to black). Images produced using black-and-white or grayscale scanners typically are displayed in Grayscale mode.
Although Grayscale is a standard color model, the exact range of grays represented can vary, depending on the printing conditions.
These guidelines apply to converting images to and from Grayscale mode:

 You can convert both Bitmap-mode and color images to grayscale.
 To convert a color image to a high-quality grayscale image, APE discards all color information in the original image.
 The gray levels (shades) of the converted pixels represent the luminosity of the original pixels.

Simply click on Grayscale control to make changes of your photo.

See also:

Resize filter | Brightness / Contrast filter | RGB filter | Grayscale filter | Blur filter | Motion blur filter
Soften filter | Sharpen filter | Emboss filter | Dilate filter | Erode filter | Colorize filter | HSL filter