canon canoscan performance problem

  • Thread starter Thread starter Neil Woodman
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Neil Woodman

Hi,

I'm having a problem with the quality of images from my canoscan n65ou,
the quality seems to have dropped since I last used it about 6 months or
so ago. Basically when I scan an image from a magazine, say at 300dpi
the image appears to have noise, often a straight line in white or
silver for example will actually look multicoloured, its hard to explain
but the quality is not good. I know it cant be the source as I am
scanning from the same things I scanned ages ago.

Is it on the way out? I have tried re-calibrating it with the software
several times.

Thanks,

Neil
 
Neil Woodman said:
Hi,

I'm having a problem with the quality of images from my canoscan n65ou,
the quality seems to have dropped since I last used it about 6 months or
so ago. Basically when I scan an image from a magazine, say at 300dpi
the image appears to have noise, often a straight line in white or
silver for example will actually look multicoloured, its hard to explain
but the quality is not good. I know it cant be the source as I am
scanning from the same things I scanned ages ago.

Is it on the way out? I have tried re-calibrating it with the software
several times.

Thanks,

Neil
Click to expand...

Perhaps, it needs the glass, mirrors and sensor cleaned.

I have a web page on cleaning a CanoScan 8400F, maybe your scanner is
similar.
http://www.carlmcmillan.com/CanonScanner/Canon.htm
 
Sounds like moire patterns for the magazine. Since the magazine is
printed with dots and your scanner uses pixels, often an interference
pattern shows up, knon as moire. Most scanners have a descreening
function that takes care of this. Look in your setup section, Epson
calls it adjustment, Nikon call it their Tool pallette. Or just look
for descreening function.
Doesn't hurt to gently clean the glass either.

Tom
 
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