When you run a website, compressing images becomes a way of life.  Finding clever ways to crush every single byte of of them not only reduces bandwidth, but reduces load times and costs as well.  Over at the WebDesignerDepot, they have an extensive writeup on techniques for ‘optimizing’ your images.

Making pages load fast is crucial to keeping the attention of visitors. They’re fickle folks these users, easily disappointed if they don’t get immediate results. When they click a link, they want the target right away.

One of the biggest bottlenecks on web pages is the size and quantity of images. The obvious solution is to use fewer images. But other techniques can help us get the most out of every pixel.

The cover the usuals (Don’t make unnecessarily large images, use sprites) but also get into some interesting tricks like Photoshop’s “19%” Glitch and how various formats treat vertical and horizontal details (like Bar-codes).

via Techniques for Squeezing Images for All They’re Worth | Webdesigner Depot.