Christopher G. Jennings

I’m Chris Jennings, a freelance software developer and usability expert. Welcome to my little patch of the Internet. Here you’ll find articles I’ve written, mainly on different areas of computing and interaction design/user experience. You’ll also find information about some of the projects I work on.

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How JPEG works: Interactively explore JPEG's lossy compression methods

2026132 points14 comments Software Engineering details

In the world of technology, “forever” means about 5 years. It’s humbling to think that the 1992 JPEG image standard is still going strong despite being more than 5 “forevers” old. Why has it been so successful? This article presents the key ideas behind JPEG in plain language and includes an interactive JPEG…