Computer Science 1033A/B Lecture Notes - Lecture 4: Transparency And Translucency, Lossless Compression, Dither

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Vivi Tryphonopolous

Document Summary

Image optimization: optimization techniques, file formats: choose . jpg or . gif, compression: compress the image data, colour resolution: number of colours used. Supports max of 8 bit colour scheme (good for clip art,not photos) Best for large areas of solid,flat colour tiny file sizes in comparison with . jpg summary:smaller file sizes but only 8 bit colour. Supports max of 24 bits per pixel (1million colours} Best for blends of colour,softer shadow effects,subtle changes in colour. Not for well defined lines or sharp contrast between colours d distorts them. Compression: to reduce file sized choose a compression technique appropriate for the web, role of compression is to: Reduce the redundancy of image data d gives ability to store or transmit data in an efficient form. Compress as much as you can without compromising quality. Compress the original bits and bytes into less bits and bytes without losing any of the image"s original information.