On Mon, 31 Mar 2003 04:09:12 -0800, Keith Whaley wrote: > Are TIFF files capable of being worked with, without the sort of > degradation seen in jpegs?
This is a common misconception. TIFF is a file format; JPEG is a compression method (JFIF is the file format that is JPEG specific). TIFF files, alone among the common image file formats, can contain the image data uncompressed, or compressed with any of several different compression methods. The compression methods including JPEG, LZW (similar to GIF), Mac PackBits, and several more specialized types. TIFF files that contain image data compressed with JPEG have exactly the same issues as .JPG (JFIF) files or any other that compresses with JPEG. That is, after all the manipulation is done, JPEG and uncompressed (TIFF, PSD, etc.) are pretty much interchangeable, as long as you use a reasonably high "quality" setting on the JPEG compression. If you will ever manipulate and resave the image, you're better off to use a file format with lossless compression (e.g. PNG, GIF, and TIFF uncompressed) or no compression at all. TTYL, DougF KG4LMZ
