Jarvis, Judice & Ninke DitheringJarvis, Judice & Ninke Dithering (henceforth referred to in this article as simply "Jarvis Dithering") is a method of dithering which tends to produce effective results with relatively few repeated pattern artifacts.
The main disadvantage of Jarvis Dithering is that it is relatively processor intensive, and therefore can be slow for the compuer to perform on large areas.
The picture below shows a True Color image, and the results of converting it to monochrome using Jarvis Dithering:
To give you an idea of what the detail of image looks like after Jarvis Dithering, here is the monochrome image greatly enlarged so that you can see the individual pixels:
Jarvis Dithering can also be used when reducing the color depth of an image. For example, when converting True Color image into a color-safe palette image, Jarvis Dithering can be used to avoid large smooth areas of color which would otherwise spoil the photographic effect of an image.
The picture below shows a True Color image, and the results of converting it to the color-safe palette, with and without using Jarvis Dithering:
To give you an idea of what the detail of image looks like after Jarvis Dithering, here is the color-safe image greatly enlarged so that you can see the individual pixels:
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