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<p>[QUOTE=&quot;-jeffB, post: 6408080, member: 27832&quot;]Well, if you just <i>move</i> the image from one place to another, there&#039;s no loss with <i>any</i> format -- copying files is always lossless, unless you get an error during the transfer.</p><p><br /></p><p>When you open an image, your computer translates it into an array of pixels, and that&#039;s what gets displayed. When you save that array of pixels as a JPEG, it gets <i>lossy compression</i> -- that is, some of the data is blurred or smeared. Next time you open it, you don&#039;t lose any further information, but the image you get isn&#039;t a perfect copy of the one you saved. And if you make any changes to that image and save it as a JPEG <i>again</i>, it gets further smeared.</p><p><br /></p><p>When you save an image in TIFF format (or any other lossless format), it might get compressed, but <i>only in a way that preserves all its data</i>. So, when you re-open that TIFF file, you get an EXACT copy of the original thing you saved. If you edit it, then save it as TIFF, no information gets lost, other than whatever you changed while editing.[/QUOTE]</p><p><br /></p>

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