whangel

whangel

Shion

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I have a scan that I did myself and I was wondering how to clean it up a bit. It's a bit pixely and I don't like that, so I'd like to reduce it if possible. I do all my scans at 300 dpi since I've found that to be the best. Can anyone suggest anything please?

Saikusa

Retired Moderator

Saikusa

~ scan-holic ~

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Scan them at a higher dpi so you can shrink them without worrying about making it too small. I'm a bit puzzled as to why it comes out pixelated though.

whangel

whangel

Shion

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Quote by saikusaScan them at a higher dpi so you can shrink them without worrying about making it too small. I'm a bit puzzled as to why it comes out pixelated though.

Could it be because I'm scanning from the strategy guide and not an artbook?

speedfreek19

speedfreek19

Belldandy Fanboy

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when you scan it in and view it at 100% generally you can see the "pixellation" of the print, scan it in at a higher dpi, and scale it down which results in a higher quality scan.

Myself i scan in at 1200dpi, may seem excessive but i get great scans from that after scaling them down.

For resizing and editing/cleaning there is photoshop, but if you want more than a 30 day trial or dont have a few hundred to spare the alternative is GIMP, it works essentially the same as photoshop but its free

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denoise software or other filters (like surface blur from phothoshop) can improve image quality significantly !
you dont have to resize your image down all the time...

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If at all possilble try to scan at the native resolution of the printout. These tend to be multiples of 133dpi, so scanning at one of those resolutions should help to minimise the dot effect of the print.

o0Beginner0o

o0Beginner0o

B for Beginner

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go to inanimations.net, there should be a tutorial there saying how to clean you scan, the way they do it is the way i do it now ^_^

Signature Imagei'm happy you're happy everyone is happy isn't that the best?

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Scan at twice the native resolution of the source material. Then, if necessary, denoise the image (I recommend using the free and open source GREYCstoration). Finally, downsample the image by a factor of 2, preferably using lanczos3, but bicubic will do fine.

If you don't know the native resolution of the source material, experiment with different resolutions until the scan has the least amount of moire artifacts. Consider this to be the native resolution, and scan at twice this resolution, as per above.

These steps will help you to obtain a clean scan. However, you may still need to adjust color and contrast so as to match the original source material. My only piece of advice here is to (almost) never use brightness controls. Instead use level curves.

Also, except for downsampling with lanczos3, all of the above can be done using the GIMP (which, like Photoshop, uses bicubic).

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Ussually I cleaning with noise reduction tool from ACDSee 7.0, not bad.

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