Invader Xan
03-04-2005, 03:45 PM
Hey people...
If it was up to me, I'd try and avoid scanning glossy printouts and suchlike... Though sadly "the customer is always right", as that old adage goes. So I was just wondering if anyone has any good methods of descreening scanned images in Photoshop.
I usuallylike to put a Smart Blur on the blue channel in RGB mode, then switch to Lab colour and use a gaussian blur on the two colour channels. That works ok on same size scans, but it's not so great for any image that needs to be blown up.
Another handy trick (which works well in the right context) is to duplicate the image layer, use curves to burn it out a bit (works best in RGB mode), apply a fairly strong gaussian blur and then decrese the opacity (sometimes changing the blending mode to Screen works well too. Using a moderate opacity like that tends to put a soft focus effect on the image, a la original series Star Trek.
Incidentally, the abovemethods are also good at removing those blocky distortions caused by too much Jpeg compression, or if someone sends you alow resolution image. Sometimes these things are salvageable, and it's easier than trying to explain image resolutions to clients.
All the same, I'm sure there are other techniques that can help.
Any suggestions?
I would've taken over the world, but I got distracted by shiny things.
Ooo! Shiny things!
If it was up to me, I'd try and avoid scanning glossy printouts and suchlike... Though sadly "the customer is always right", as that old adage goes. So I was just wondering if anyone has any good methods of descreening scanned images in Photoshop.
I usuallylike to put a Smart Blur on the blue channel in RGB mode, then switch to Lab colour and use a gaussian blur on the two colour channels. That works ok on same size scans, but it's not so great for any image that needs to be blown up.
Another handy trick (which works well in the right context) is to duplicate the image layer, use curves to burn it out a bit (works best in RGB mode), apply a fairly strong gaussian blur and then decrese the opacity (sometimes changing the blending mode to Screen works well too. Using a moderate opacity like that tends to put a soft focus effect on the image, a la original series Star Trek.
Incidentally, the abovemethods are also good at removing those blocky distortions caused by too much Jpeg compression, or if someone sends you alow resolution image. Sometimes these things are salvageable, and it's easier than trying to explain image resolutions to clients.
All the same, I'm sure there are other techniques that can help.
Any suggestions?
I would've taken over the world, but I got distracted by shiny things.
Ooo! Shiny things!