Image:Posterization example.jpg

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[edit] Summary

The following is an example of a scenario where posterization may occur, and relates to the image above. A photo saved in JPEG has 256 variations of luminosity in Red, Green and Blue (RGB) in which to derive its colours. This is approximately 16.7 million colours (256*256*256). However, if you were to take this image and save it as a GIF format image, which has a total of only 256 variations of RGB in which to work with, then the subtle transitions in colour and luminosity that your original photo contained may end up in very obvious and aesthetically unpleasing 'jumps' from one shade to another. This is posterization.

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Date/TimeDimensionsUserComment
current18:52, 8 December 2005658×894 (241 KB)Diliff (The following is an example of a scenario where posterization may occur, and relates to the image above. A photo saved in JPEG has 256 variations of luminosity in Red, Green and Blue (RGB) in which to derive its colours. This is approximately 16.7 mil)
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Metadata

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Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used Adobe Photoshop CS2 Windows
File change date and time 13:43, 8 December 2005
Color space sRGB