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URI: http://www.j-a-b.net/web/graf/dithering-img-4bit
last updated: 2009-12-04
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Dithered 4bit Images

The effect of dithering in indexed 4bit images with a maximum of 16 colours is shown in the chart below. Clicking the radio button below any image fixes the image to the viewport. When scrolling the page, the image follows, letting you compare it to other images .

Dithering in 4bit images
Image Conversion	zoom upper right corner
unfix
Image Conversion	zoom upper right corner
unfix
Original Image (32bit - TrueColor) Colours: 34,426 File Size: 58,628 bytes fix it	zoom Colours: 9,561 File Size: 20,700 bytes fix it
Optimized 16 Colour Palette
none Colours: 16 File Size: 4,779 bytes fix it	zoom Colours: 14 File Size: 1,425 bytes fix it
ordered Colours: 16 File Size: 8,071 bytes fix it	zoom Colours: 15 File Size: 2,372 bytes fix it
Floyd-Steinberg Normal Colours: 16 File Size: 9,636 bytes fix it	zoom Colours: 15 File Size: 2,783 bytes fix it
Floyd-Steinberg Advanced Colours: 16 File Size: 9,207 bytes fix it	zoom Colours: 15 File Size: 2,667 bytes fix it
Websafe VGA Colour Palette
none Colours: 12 File Size: 3,090 bytes fix it	zoom Colours: 10 File Size: 1,078 bytes fix it
ordered Colours: 13 File Size: 10,165 bytes fix it	zoom Colours: 10 File Size: 3,339 bytes fix it
Floyd-Steinberg Normal Colours: 15 File Size: 13,116 bytes fix it	zoom Colours: 12 File Size: 3,984 bytes fix it
Floyd-Steinberg Advanced Colours: 14 File Size: 11,381 bytes fix it	zoom Colours: 12 File Size: 3,623 bytes fix it