Ugly Woodgrain Looking Patterns On My Photos

LP
Posted By
lynn_peden
Nov 12, 2003
Views
331
Replies
9
Status
Closed
When I open my pictures in the Windows Picture And Fax Viewer they look crystal clear and print crystal clear as well. But when I open them in Photoshop, or another program called Photo Impression, they have ugly woodgrain looking patterns on them and they print like that as well. Anyone know the cause and what can be done?
Any help is greatly appreciated.
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P
Phosphor
Nov 12, 2003
I have no idea what it is you’re trying to describe.

How about if you take a screen shot of both instances, composite them side by side in one image, upload it and place a link in this thread so we have a visual reference upon which to comment.
LP
lynn_peden
Nov 12, 2003
Im talking about ugly lighter colored bands on the picture. They are kinda swirled like in a woodgrain pattern, or sort of similar to zebra or tiger stripes.
PP
Philip_Peterson
Nov 12, 2003
Moire maybe? Were the pictures scanned?
RH
r_harvey
Nov 12, 2003
It sounds like color reduction. Say you have a sky that transitions from dark to light, instead of looking smooth, it would be wide bands of slightly-different blues. It’s not happening just in Photoshop, so is the video card getting set in 256-color mode, or some other change along the way?
LP
lynn_peden
Nov 12, 2003
I dont know about the video card. If it were a problem there, wouldnt they look that way and print that way from the Windows viewer as well?
CW
Colin_Walls
Nov 12, 2003
Do you see this at all magnifications in PS? What about 100%, 50%, 25%?
M
mattmatt32
Nov 12, 2003
I think I see what may be happening. The Windows Picture Viewer (like PowerPoint and Word) is anti-aliasing the display of bitmap images, so any moire effects are unseen. It also appears to affect printout of the image, but I have only provided a screenshot of the differences as they appear on a monitor: http://www.sewrpc.org/samples/moire.htm .

It makes sense that Photoshop would not anti-alias bitmap displays, you don’t want an effect to interfere with the display of image data.
JS
John_Slate
Nov 13, 2003
mattmatt:

You didn’t by any chance go to the Taft School did you?

Cause that sure as hell looks like a picture from one of the yearbooks when I was there!

The guy in the lower right is Daniel Garzes I think…
M
mattmatt32
Nov 13, 2003
To find a large sample I did a Google image search for "moire", this is where the picture came from:
http://www.scottkelbybooks.com/Photoretouch/images/moireblur .jpg . So that’s about all I can tell you.

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