----- Original Message ----- From: "Tom C" Subject: JPEG Compression Limits
> I've been trying to get my PUG entry finished and when getting to the last > step of saving it as a .jpg, the smallest I can compress the file is 102K, > at Photoshop quality level of zero. This is for an image that is 600 * 394 > pixels, resampled at 72 ppi. There is noticieable degradation in the image. > > The smallest I can compress the image at it's physical pixel size, and still > get reasonably good results yields a filesize of 134K at Photoshop quality > level 3. > > Any suggestions or have I simply hit the compression wall? The image is a > silohuetted trees with fairly open branches and therefore, I assume, has > quite a bit of image info compared to shots that may have large contiguous > blocks of color (assuming again I have an inkling of how jpeg compression > works). Try making the file physically smaller. Knock 50 pixels off the longest side while maintaining the same aspect ratio and see how it does. If that doesn't do it, go back in history to the original size, and knock 75 pixels off the long side. It was how I dealt with oversize files when I ran the show. William Robb
