Understanding file formats: What do the JPGs, the TIFFs and the PNGs mean?
We constantly bandy around the terms JPG and TIFF, in particular, and note that downloaded logo or graphic could be a PNG. But what do they all mean? I'm no expert, but I now know a lot more after reading this article in Macworld by Lesa Snider. Most of us know this one, by the way:
JPEG stands for the Joint Photographic Experts Group that developed it. It supports a wide range of colors, so it’s the one most folks capture on their cameras and scanners (JPEG works well for black-and-white photos, too). However, JPEGs are also compressed, so some detail gets sacrificed to produce a smaller file size, which is great for maximizing space on your camera’s memory card, posting online, or for sharing via email.
But GIFs, TIFFs and PSDs could do with a bit of further explanation and so Lesa's article is a good place to mug up on the facts.