Compressing images for the Internet

Giordano B. Beretta

doi:10.1117/12.298304

2 January 1998 Compressing images for the Internet

Giordano B. Beretta

Proceedings Volume 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III; (1998) https://doi.org/10.1117/12.298304
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

The World Wide Web has rapidly become the hot new mass communications medium. Content creators are using similar design and layout styles as in printed magazines, i.e., with many color images and graphics. The information is transmitted over plain telephone lines, where the speed/price trade-off is much more severe than in the case of printed media. The standard design approach is to use palettized color and to limit as much as possible the number of colors used, so that the images can be encoded with a small number of bits per pixel using the Graphics Interchange Format (GIF) file format. The World Wide Web standards contemplate a second data encoding method (JPEG) that allows color fidelity but usually performs poorly on text, which is a critical element of information communicated on this medium. We analyze the spatial compression of color images and describe a methodology for using the JPEG method in a way that allows a compact representation while preserving full color fidelity.

Citation Download Citation

Giordano B. Beretta "Compressing images for the Internet", Proc. SPIE 3300, Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts III, (2 January 1998); https://doi.org/10.1117/12.298304

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