Dither - Wikipedia, the free encyclopedia
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Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as "banding" (stepwise rendering of smooth gradations in brightness or hue)...
en.wikipedia.org/wiki/Dither
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It is possible to display a grey-level image in a bilevel device such as monochrome displays and many hardcopy printers by using a technique called image dithering. It consists of mapping the original grey image into a binary image.
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www.dca.fee.unicamp.br/dipcourse/html-dip/c3/s7/front-p...
www.dca.fee.unicamp.br/dipcourse/html-dip/c3/s7/front-page.html
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Most images are dithered in a diffusion or randomized pattern to diminish the harsh transition from one color to another. But dithering also reduces the overall sharpness of an image, and it often introduces a noticeable grainy pattern in the image.
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webstyleguide.com/wsg2/graphics/dither.html
webstyleguide.com/wsg2/graphics/dither.html
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Image dithering occurs when a browser on a 256-color computer can not display a color that is not in its color palette and it tries to approximate the color with available colors. Dithering makes an image appear speckled.
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phoenix.liu.edu/jmeschi/grweb/dithered.htm
phoenix.liu.edu/jmeschi/grweb/dithered.htm
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Particular emphasis is given to the processing of data from the optical and near-IR cameras on the Hubble Space Telescope (HST). We first describe how the optics, detector and dithering affect the resultant image.
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www.adass.org/adass/proceedings/adass99/O6-02/
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For an example of how dithering works, consider an image that contains a number of dark orange pixels for which there is no exact match in the colormap.
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www.mathworks.com/access/helpdesk_r13/help/toolbox/imag...
www.mathworks.com/access/helpdesk_r13/help/toolbox/images/color7.html
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As promised in my previous post, here's a small opensource project from my side. It's tiny, really, but I hadn't seen an ActionScript implementation of any form of Image dithering before.
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www.unitzeroone.com/blog/2008/05/06/opensource-image-di...
www.unitzeroone.com/blog/2008/05/06/opensource-image-dithering-for-as3-demosource/
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"He has an unusual personality type which is the mirror image of Blair," said Anthony Seldon, a political commentator and biographer of Blair who praises Brown's intellect even if he has an awkward manner.
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www.reuters.com/article/worldNews/idUSLH2262820080917?f...
www.reuters.com/article/worldNews/idUSLH2262820080917?feedType=RSS&feedName=worldNews&rpc=22&sp=true
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A simple means of correcting quantization error is to employ a technique known as error diffusion, a specific form of image dithering, which operates by distributing quantization error over a small neighborhood surrounding the target pixel.
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www.micro.magnet.fsu.edu/primer/java/digitalimaging/pro...
www.micro.magnet.fsu.edu/primer/java/digitalimaging/processing/colorreduction/index.html
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