hi,
when acquiring images from scanner i got:
1) with photo i got a neat image, that ok
2) with photo from magazine i got image with pattern, though the original image is sharp.
how may i get rid of that pattern and get a neat image like the original?
thnks for help
marc
acquire image from scannre
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keenart
marc
I believe you are talking about a moiré pattern. Most scanners will not scan copyrighted material with out a moiré pattern. PI does not have a Remove Moiré Pattern adjustment.
If your scanner came with special software, it might have that feature. Otherwise, each image must receive many selectively applied adjustments to remove the pattern. Therefore, it is difficult to say what combination might work for your image.
Remember the pattern is there to foil, be careful what image and how you republish.
I believe you are talking about a moiré pattern. Most scanners will not scan copyrighted material with out a moiré pattern. PI does not have a Remove Moiré Pattern adjustment.
If your scanner came with special software, it might have that feature. Otherwise, each image must receive many selectively applied adjustments to remove the pattern. Therefore, it is difficult to say what combination might work for your image.
Remember the pattern is there to foil, be careful what image and how you republish.
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heinz-oz
@keenart
sometimes you make me wonder, how on earth does a scanner know whether or not you are scanning copyrighted materials????
The moire patter you get when copying magazines etc. has to do with image resolution and the CMYK print patterns. Just look at a magazine photo with a magnifying glass and you will know what I'm talking about.
The only way to reduce the noise at the scanning stage is to modify your scan resolution to suit. Most scanner drivers have settings to adjust the resolution based on the source of the scan. The scanner will use different scan resolutions for photo or magazine print scans.
sometimes you make me wonder, how on earth does a scanner know whether or not you are scanning copyrighted materials????
The moire patter you get when copying magazines etc. has to do with image resolution and the CMYK print patterns. Just look at a magazine photo with a magnifying glass and you will know what I'm talking about.
The only way to reduce the noise at the scanning stage is to modify your scan resolution to suit. Most scanner drivers have settings to adjust the resolution based on the source of the scan. The scanner will use different scan resolutions for photo or magazine print scans.
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Terry Stetler
- Posts: 973
- Joined: Thu Mar 17, 2005 3:34 pm
- Location: Westland, Michigan USA
And most scanner control panels will have a "Descreen" option for use with magazine images, art prints, newspapers or other non-continuous tone graphics. Setting this minimizes artifacting of such images.
Slight morie's can be mitigated by using either a median filter (radius between 1-3) or slight gaussian blur.
Scanning at 200% the resolution you expect to use for output minus 10 (150 dpi -> 300-10 = 290 dpi) then shrinking it down to the size you want can also help.
Slight morie's can be mitigated by using either a median filter (radius between 1-3) or slight gaussian blur.
Scanning at 200% the resolution you expect to use for output minus 10 (150 dpi -> 300-10 = 290 dpi) then shrinking it down to the size you want can also help.
Last edited by Terry Stetler on Sun Aug 13, 2006 4:40 am, edited 2 times in total.
Terry Stetler
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keenart
Yes, some copyrighted material is designed to intentionally produce a moire pattern, and some scanner software is smart enough to know the difference. So are certain copying machines to foil reproducing or conterfieting of certain types of materials. All of this technology has been around for several decades.
The important point is the pattern is very difficult to remove and PI does not have tha bility to do so without extensive adjustments and modification to the image.
The important point is the pattern is very difficult to remove and PI does not have tha bility to do so without extensive adjustments and modification to the image.