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restoring over compressed jpg images

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Old 05-20-2010, 07:47 AM
trkl trkl is offline
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restoring over compressed jpg images


I´m new to this forum, and thought I´d start asking questions right away. Tried searching the forum but couldn´t find that much about this.

I´m wondering if any of you have any good techniques when it comes to fixing jpg block structures on over compressed images. I know there are lots of programs that do this but I´d like to find a way to do it in PS.

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Old 05-20-2010, 09:50 AM
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TommyO TommyO is offline
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Re: restoring over compressed jpg images

Without using a 3rd party utility, the PS Filter > Noise > Reduce Noise filter has a check box for reducing compression artifacts. Unfortunately, no slider to control the effect.

However, there are free utilities for this also.

Other than that, in PS it can be rather difficult. There are methods to simply re-scale the image which allows the algorithms to smooth those edge areas back out. Many people experiment with multiple iterations of enlarging, shrinking.
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Old 05-20-2010, 11:22 PM
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Craig Walters Craig Walters is offline
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Re: restoring over compressed jpg images

hi trkl and welcome to RP.

the technique would depend on the image. your 'blocks' might be huge or small and would probably need different treatments. best to post a pic or an example of some kind that shows exactly the condition of the image.

just offhand, without seeing anything, filters like 'jpg artifact removal', 'median', de-noise filters and programs and simple cloning or airbrushing might work. again, best to post an image.
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