Media, Information and Technoculture 1020E Lecture Notes - Lecture 8: Lossless Compression, Gif, Horse Length
2 Dec 2016
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Document Summary
Good for photographs, computer games, screenshots, stills from a movie, etc. Best for blends of color, softer shadow effects, subtle changes in color. Not good for well-defined lines or sharp contrasts between colours the original. Jpg does a lossy compression: discards more data about colours than about brightness. Not all of the information in the original image is preserved not the same as. Compression is achieved by (cid:494)forgetting(cid:495) certain details about the image, Degree of amount of information lost (lossyness) can be varied by which the jpg will then try to fill in later when it is being displayed. Degrades the image quality adjusting compression parameters. (controlled by you) Because image data is lost with each compression, work with the image in native format, and when ready with final product, save it as a . jpg file. Created specifically because of licensing issues with gifs in the 90s. Two versions of png: png-8, png-24.
