EECS 1520 Midterm: TEST 2 NOTES

• School: York University
• Department: Electrical Engineering and Computer Science
• Course: EECS 1520
• Professor: John Hofbauer

Document Summary

Test 2 notes, febuary 9th (everything tested onwards will be on the test) An image that is defined using mathematical equations representing lines, curves, and polygons. Can be enlarged without a loss of detail, or change in file size. Images created using drawing applications or text editors. Svg (scalable vector graphics: popular vector graphics format, files are text-based and can be compressed accordingly. An image that is comprised of a matrix of pixels. Very good for photographs, but suffers from pixilation: when enlarged, the rectangular shape of pixels becomes apparent. Instead of representing all colours, save only those used. Like compressing text with keyword encoding, but with colour instead. Gif (graphics interchange format, pronounces jiff : lossless, indexed colours (maximum of 256), run-length encoding, compression ratios of 10, allows transparency and animation. Png (portable network graphics: lossless compression using indexed colours, run-length encoding, compression ratios of 7, allows transparency. Png and gif best used for line drawings, logos, or diagrams.