JPEG image compression FAQ, part 1/2

• Introduction
• [1] What is JPEG?
• [2] Why use JPEG?
• [3] When should I use JPEG, and when should I stick with GIF?
• [4] How well does JPEG compress images?
• [5] What are good "quality" settings for JPEG?
• [6] Where can I get JPEG software?
• [7] How do I view JPEG images posted on Usenet?
• [8] What is color quantization?
• [9] What are some rules of thumb for converting GIF images to JPEG?
• [10] Does loss accumulate with repeated compression/decompression?
• [11] What is progressive JPEG?
• [12] Can I make a transparent JPEG?
• [13] Isn't there a lossless JPEG?
• [14] Why all the argument about file formats?
• [15] How do I recognize which file format I have, and what do I do about it?
• [16] How does JPEG work?
• [17] What about arithmetic coding?
• [18] Could an FPU speed up JPEG? How about a DSP chip?
• [19] Isn't there an M-JPEG standard for motion pictures?
• [20] What if I need more than 8-bit precision?
• [21] How can my program extract image dimensions from a JPEG file?
• [22] Where can I learn about using images on the World Wide Web?
• [23] Where are FAQ lists archived?