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home > issues > 26

Will Broadband Penetration Peak at 75%? - Graphics: Minimize Dithering

Optimization Week Issue #26, May 24, 2004

In this month's Bandwidth Report, as the US approaches 50% broadband penetration for active Internet users, there appears to be a broadband saturation plateau at 70% to 75% percent. We talked to some experts to find out why. Dithering can be both a blessing and a curse when optimizing images. At lower bit-depths GIFs and PNGs can appear banded. Dithering can smooth out these jarring color transitions, but at the price of increased file size. However, combined with "lossy" compression, weighted optimization, and histogram influencing, dithering can allow you to use lower bit-depths.

Will Broadband Penetration Peak at 75%? - US Broadband Penetration Jumps to 47.9% - May 2004 Bandwidth Report
US broadband penetration jumped by 1.9 percentage points to 47.9% in April. Is there a broadband saturation limit?
Graphics: Minimize Dithering
Dithering uses existing colors to strategically change pixels to minimize apparent banding. While dithering increases file size, when used in combination with lossy compression and weighted optimization, dithering can allow lower bit-depths for GIFs and PNGs.