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Ranko

Joined: 13 Jul 2006
Posts: 3

PS Version: CS1
OS: Mac OS X.4.11

PostPosted: Sat Jan 05, 2008 12:08 pm    Post subject: Cleaning up a scanned image? Reply with quote

I was wondering what some good techniques are for cleaning up a scanned image? The image I have has some white spots on a black background, and some wrinkling on the edges where the paper was worn down.

I want to sharpen the single-color regions, and preserve the drawings. A good example is the lower left corner where I want to remove the bubble and fix the edge of the red line. I've used PS before, but it's been so long I've forgotten nearly everything I knew about it. Cry

Any help is appreciated!



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helcyon

Joined: 02 Oct 2005
Posts: 191

PS Version: CS3
OS: OSX 10

PostPosted: Sun Jan 06, 2008 12:21 am    Post subject: Reply with quote

I would say use the clone and stamp tool along with the healing brush.
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Matt
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Joined: 24 Sep 2007
Posts: 3515
Location: Haverhill, UK
PS Version: Lightroom 5, CS4 & Elements 11
OS: Windows 8.1

PostPosted: Sun Jan 06, 2008 6:15 am    Post subject: Reply with quote

Hi there
I downloaded your work and had a little play with it.
When I looked more closely at the image I was horrified to see the amount of JPEG compression artifacts that exist. If you look at the blue area you'll see what I mean. I assumed you've downsampled it to get it on the site but if you haven't, or scanned straight into the JPEG format, will have you the chance to scan it again? Maybe into the PNG or TIFF (preferred) format? JPEG isn't such a good choice for line art and text etc.

It's hard to know what a corrected version of this image should look like seeings as I've never seen the original, however I started by forcing the background to black and a section of the robot to white using the eyedropper tools inside Levels. I then applied another levels adjustment layer and worked on setting the text to white (not sure if this is how it's meant to be though) and then masking out everything else in the image.

I then used the clone stamp tool (as suggested by helcyon) and a few selection methods to rid the image of bubbles and scratches. I then started cleaning up the text (the best I could) by painting away the stray pixels around the letters. I only got as far as 'build your own' before I started realising just how bad some of those compression artifacts are.

I'm sure you'll have better luck with the high resolution original scan!
Hope this helps



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Work in Progress!
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Matt
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Ranko

Joined: 13 Jul 2006
Posts: 3

PS Version: CS1
OS: Mac OS X.4.11

PostPosted: Mon Jan 07, 2008 9:17 am    Post subject: Reply with quote

helcyon wrote:
I would say use the clone and stamp tool along with the healing brush.


It's slow-going, but that is working.

mattyboy777 wrote:
Hi there
I downloaded your work and had a little play with it.
When I looked more closely at the image I was horrified to see the amount of JPEG compression artifacts that exist. If you look at the blue area you'll see what I mean. I assumed you've downsampled it to get it on the site but if you haven't, or scanned straight into the JPEG format, will have you the chance to scan it again? Maybe into the PNG or TIFF (preferred) format? JPEG isn't such a good choice for line art and text etc.

It's hard to know what a corrected version of this image should look like seeings as I've never seen the original, however I started by forcing the background to black and a section of the robot to white using the eyedropper tools inside Levels. I then applied another levels adjustment layer and worked on setting the text to white (not sure if this is how it's meant to be though) and then masking out everything else in the image.

I then used the clone stamp tool (as suggested by helcyon) and a few selection methods to rid the image of bubbles and scratches. I then started cleaning up the text (the best I could) by painting away the stray pixels around the letters. I only got as far as 'build your own' before I started realising just how bad some of those compression artifacts are.

I'm sure you'll have better luck with the high resolution original scan!
Hope this helps


Yeah, I just made that for this site. The original I'm working with is a large TIFF. The artifacts made me cringe, too. LOL
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helcyon

Joined: 02 Oct 2005
Posts: 191

PS Version: CS3
OS: OSX 10

PostPosted: Mon Jan 07, 2008 2:16 pm    Post subject: Reply with quote

If you are using the stamp/healing tool, another good tip on using that is to make and use paths.

Either use the marquee, or draw paths with the pen tool. Once you create the path, load it as a selection. This way you can clone specific sections without going into part of the image you dont want to. This also helps to keep straight/precise lines. If you want precise lines that are not hard, just feather the selection.

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