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Old 04-02-2007, 01:24 PM   #1
Bill Murmann
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Default Can Scan Lines Be Removed?

I have a collection of digital Lunar Orbiter photographs of the Moon that were taken by one of the NASA space probes.

The photos have scan lines in them caused by the camera equipment. Is there any way to use Paint Shop Pro to clean up these images?

I know how to use PSP to do some image-editing and enhancement, but these scan lines are beyond my experience.

I'd appreciate any suggestions.

--Bill
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Old 04-03-2007, 02:08 AM   #2
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Have you tried the scratch removal tool? That might work - though without seeing what the lines look like, am not sure.
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Old 04-03-2007, 09:28 AM   #3
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I use photoshop but PSP should have a tool so you can sample an area right next to the scan lines to pick up the colour, then you should be able to use a paintbrush or a cloning tool to fill in the lines, using the colour you just sampled. In photoshop you can just run the clone tool along the line and it will automatically sample and fill in as it goes along. Perhaps PSP has the same kind of thing.

   
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Old 04-03-2007, 01:56 PM   #4
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See if there's anything like an "interlace" or "de-interlace" filter.

   
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Old 04-04-2007, 12:38 AM   #5
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I've tried the following method with success. Copy the picture onto a new layer and give the new layer a transparency of about 50%. Then nudge the new layer a few pixels so that it covers the scan lines. Adjust the transparency till you get optimal results.

You'll lose some sharpness but that might be partially masked by sharpening.

   
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Old 04-04-2007, 06:43 AM   #6
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I'll have to try that, Lois. The scan lines are horizontal from left to right, running throughout the images at spaced intervals. They were created by the NASA satellite's camera that took the Moon photos.

Removing them might be too much to expect...(??)

--Bill
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Old 04-04-2007, 06:55 AM   #7
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I'll have to try that, Tim. The scan lines cross light and dark areas on the images, which are in grayscale. In the past when I've touched up grayscale photos for a customer's newspaper, I've noticed that the clone tool will carry a dark color over into light areas and vice versa.

Of course, that was using Paint Shop 9. Now I'm learning to use the new PSP 11. Perhaps the Version 11 tools have been enhanced. (??)

--Bill
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Old 04-04-2007, 06:58 AM   #8
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I'll check the software--although I have to admit I have limited experience with image editing. Unfortunately, I don't know what an "interlace" filter does.

--Bill
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Old 04-04-2007, 07:01 AM   #9
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Thanks, Mike. I'll have to experiment. Unfortunately, I'm still pretty far back on the learning curve when it comes to image-editing. I'm definitely interested in learning, however.

--Bill
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Old 04-04-2007, 07:04 AM   #10
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Quote:
Originally Posted by Bill Murmann View Post
I'll check the software--although I have to admit I have limited experience with image editing. Unfortunately, I don't know what an "interlace" filter does.
An interlaced image appears in horizontal stripes. Quite common before widespread use of broadband made it less necessary.

There may be other uses that I don’t know about.

   
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