Morning Research

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I've been getting an error from Windows XP when I try to rotate a JPEG file, either from Explorer (right click, "Rotate [Counter] Clockwise"), or through Windows Picture and Fax Viewer.

Because of the dimensions of this picture, rotating it might permanently reduce its quality.

This has been bothering me for a while, so I actually did a little research into the matter. It turns out that if your image's dimensions are not a multiple of 16, XP has to recompress the image after rotating it, which is where the reduction in quality comes in. Thanks Bill, you're the best.

So, what to do about it? I found a page that has more information, including a link to a program that will do lossless JPEG rotation [Exifer for Windows]. Pretty handy, if you aren't exactly a Photoshop master.

I tried Exifer out and it seems to work quite well. The English translation isn't perfect, but it gets the job done, and the rotation appears to work as advertised. It's also free, which is nice.

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This page contains a single entry by Andrew published on December 20, 2005 10:51 AM.

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