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unabonger
Jan 2, 2004, 7:17 PM
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This is a shot that I scanned from an old 4x6. The print doesn't exhibit the horizontal striations that you see here. Is this happening because my scanner is poor? Same results at different DPI settings...obviously I could use photoshop to fix this picture but others with more color mixes wouldn't be so easy for me...suggestions? There's another photo in my gallery also, the one of Power Bulge, that has the same thing...
http://www.rockclimbing.com/...n=Show&PhotoID=22747
http://www.rockclimbing.com/...p.cgi?Detailed=22746
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melekzek
Jan 2, 2004, 8:44 PM
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Check this one about scanning tips and tricks. With every scan I make, I get better.
In reply to: horizontal striations |
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melekzek
Jan 2, 2004, 8:57 PM
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if by "horizontal striations" you mean what I think you mean, it might be a sharpening artifact. As joe said, check the settings, if there is a default sharpening during the scan, disable it, and use unsharpen mask in PS
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unabonger
Jan 2, 2004, 10:58 PM
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melekzek,
Look in the lower left quadrant and you'll see horizontal lines. It is more evident in the other picture, which I've linked.
I'll play with the sharpening setting.
Oh, and Joe, what fashion massacre? It all looks good to me...
Now this pic is a different story:
http://www.rockclimbing.com/...p.cgi?Detailed=23094
Thanks.
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melekzek
Jan 2, 2004, 11:24 PM
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are they in the same direction of scanning? Try rotating the picture, if the lines rotate as well, than it is the scanner creating problems. Check vuescan software, it allows multiple passes, and averages between them, it should minimize that.
Sometimes the light of the scanner is so strong, it will pass through the thin magazine paper and show the underlying fiber structure, but I guess this is not it.
I was going to suggest experimenting w/ different dpi, but you already did that.
I also suggest neatimage software, it is freeware, and does amazing job in cleaning noisy scans.
Now I am out of ideas....
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popol
Jan 3, 2004, 6:22 PM
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Best suggestion I can make (ifyou don't want to rework it with PS using clone stamp etc.): scan at the highest optical resolution of your scanner, and resize the pictures afterwards to the required size.
That way, maybe the horizontal lines are blurred out, because your PS software will combine several pixels to make 1 new pixel. Worth a try?
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akornylak
Jan 4, 2004, 4:44 AM
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That is noise from the electronic parts in your scanner, that is being picked up by the CCD. You can test this by scanning a completely black piece of paper. You should see the same banding on the black scan. Also test it by turning your scanner off for a while. The noise gets worse over time as the scanner warms up. Its just a junky scanner, or maybe you have it sitting on a space heater. I assume you are using a flatbed scanner. What scanner are you using?
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melekzek
Jan 5, 2004, 9:00 PM
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In reply to: The noise gets worse over time as the scanner warms up. |
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unabonger
Jan 5, 2004, 9:26 PM
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Yeah, its pretty cheap. Its a $100 HP printer/scanner/copier. Really only good for scanning documents I suppose.
Thanks for the input all.
UB
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