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I perform lots of small edits of JPGs daily on my computer, and was wondering whether there was a way to perform cropping and rotation without the loss of quality during recompression. I know there are programs out there like BetterJPG which do this, but shouldn't this function already exist in Photoshop?
Any thoughts on this?
Henrik Söderlund
Posted 2012-08-04T04:27:02.937
Reputation: 641
Not what you asked, but IrfanView also does this – Rich Homolka – 2012-08-04T04:33:11.413
I have an earlier version of PS, but believe it does these operations losslessly, at least for 90° rotations and rectangular crops. – martineau – 2012-08-04T04:41:33.523
Can you losslessly edit a .JPG? Any changes to the image must be made while it is decompressed... and the only way to get a modified, decompressed image back into a .JPG is to recompress it... Cropping isn't just a "Oh, let's cut out this data here" once you start to involve compression. – Darth Android – 2012-08-04T07:49:16.717