compression

Google Wants to Speed Up the Web by Killing the JPEG

Google unveiled a new image format today called WebP that it hopes will make the web faster by cutting files sizes of images without affecting quality. According to a blog post they published earlier today, photos and images account for 65% of the bytes transmitted by websites. In their tests done using 1 million randomly selected images from the web, re-encoding images as WebP resulted in an average file size reduction of 39%. Here's a gallery with image and file size comparisons.

Saving JPEG Photos Hundreds of Times

Most of you probably know that JPEG is lossy compression method, meaning compression permanently throws out data and detail. Luckily, a typical compression can save 10 times the space of an uncompressed image without sacrificing much noticeable quality. However, if the image is repeatedly compressed and saved, artifacts introduced during compression become more and more obvious.