When I scan I get those 'dots' or 'pixellations' or what ever over my picture - how do I eliminate this problem to give a clean scan. For example follow the link: http://lobotomy.pleh.net/~flareupload/uploads/44/kohnma.jpg Posted by Aban Rune (Member # 226) on :
It's almost impossible to get rid of it. Some scanners have what called a "descreening" function which is a fancy way of saying they blur the picture a little to get the dots to be less noticable. It happens when you scan printed material. Printing is done with little dots of ink, so when you scan... you're scanning dots.
My best advice is to scan it hella lot bigger than you need it, then reduce size and resolution.
Posted by SoundEffect (Member # 926) on :
From what I've learned of descreening, it's a filter that helps to remove the patterns of dots that appear from newsprint or magazine pictures. It's not so much a blurring effect, but a pattern removal. My scanner software allows me to select the level of descreening, plus it has presets for artwork, newsprint and magazines.
I agree that scanning larger than needed and reducing (in Photoshop, for example) will greatly increase the quality of your scans.
Look in your scanner's help section. Most have a 'moire removal' or 'descreen function'.
Posted by AndrewR (Member # 44) on :
Thanks for the info. My scanner does indeed have the descreening function - but I've just scanned something else - so I'll have to play around with it next scan! It also has that newspaper/magazine/artprint function.
Andrew
Posted by Aban Rune (Member # 226) on :
It may just be the scanner I'm using, but the descreen thing has never worked satisfactorily for me. Hope you have better luck with yours Posted by AndrewR (Member # 44) on :
Nah - the de-screen thing didn't really work, neither did the Moire button in PSP. I think it DOES sorta blur the pic to spread the 'dots'.
![[Smile]](smile.gif)
It also has that newspaper/magazine/artprint function.