Pattern Moire? Help

**Dice** · 02-15-2009, 02:24 PM

I took some photos yesterday and upon uploading them to flickr noticed a regular square pattern in the foliage, bark most areas. I'm not sure if this is my fault or something else. I'm looking for some help.
Here is the link to the flickr page
Mt Diablo Snow - a set on Flickr

If you run the slide show I think it shows it pretty well.

kevin

Marc Sabatella · 02-15-2009, 02:30 PM

That's a lot of pictures, and it isn't clear exactly where to look. Couldn't you just post one crop that shows it clearly?

**Dice** · 02-15-2009, 02:49 PM

hmmm. Hi Marc. Thanks for your response. Although I'm noticing that when I crop the shot the effect goes away. hmmm. maybe my pp software doing something funky with it? confused but maybe it is software and not camera or me

Marc Sabatella · 02-15-2009, 10:22 PM

Originally posted by Dice

Although I'm noticing that when I crop the shot the effect goes away. hmmm. maybe my pp software doing something funky with it?

Merely cropping makes it go away? That seems unlikely. *Resizing* the image definitely makes a lot of effects go away or be less noticeable, which is the whole reason people ask to see crops - so the image is *not* resized and yet still fits on the screen.

rburgoss · 02-16-2009, 06:24 AM

Originally posted by Dice

I took some photos yesterday and upon uploading them to flickr noticed a regular square pattern in the foliage, bark most areas. I'm not sure if this is my fault or something else. I'm looking for some help.
Here is the link to the flickr page
Mt Diablo Snow - a set on Flickr

If you run the slide show I think it shows it pretty well.

kevin

Even thugh your link shows nothing here, I can say there are two kinks of moire effects.

First one is produced in camera, when certain patterns are pictured and the "cadence" of such patterns closely matches the cadence of the sensor's pixels. This WAS usual with 1 to 3 megapix cameras with very sharp glass, shooting things like fabrics, tight screens (mosquito nets) and such. This type of moire pattern is actually in the pictures and will not go away by resizing unless you are creating thumbnails, in which such pattern is so greatly reduced in resolution that it turns into a blob.

The other is produced in your computer screen, when the actual pattern pictured is showed at a certain resolution, that closely matched your screens resolution. This moire pattern goes away if picture is resized or by simply enlarging or reducing in screen. You can tell if this is your case when the moire pattern "changes" its appeareance when you enlarge or reduce picture in screen.

I believe this is your case. Such moire pattern may well be not showing on everyone's screen. You simply, by accident, resized your picture in which a photographed pattern closely matched your screen's resolution.

A simple test to discard this, is to actually print the picture (high quality) by lab or inkjet with photo paper. I am almost shure the moire pattern will not show on the print.

02-15-2009, 02:24 PM	#1
Dice Site Supporter Join Date: Feb 2008 Location: Emeryville, CA Posts: 1,122	Pattern Moire? Help I took some photos yesterday and upon uploading them to flickr noticed a regular square pattern in the foliage, bark most areas. I'm not sure if this is my fault or something else. I'm looking for some help. Here is the link to the flickr page Mt Diablo Snow - a set on Flickr If you run the slide show I think it shows it pretty well. kevin

02-15-2009, 02:30 PM	#2
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	That's a lot of pictures, and it isn't clear exactly where to look. Couldn't you just post one crop that shows it clearly? Last edited by Marc Sabatella; 02-15-2009 at 10:20 PM.

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02-15-2009, 02:49 PM	#3
Dice Site Supporter Join Date: Feb 2008 Location: Emeryville, CA Posts: 1,122 Original Poster	hmmm. Hi Marc. Thanks for your response. Although I'm noticing that when I crop the shot the effect goes away. hmmm. maybe my pp software doing something funky with it? confused but maybe it is software and not camera or me

02-15-2009, 10:22 PM	#4
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	Originally posted by Dice Although I'm noticing that when I crop the shot the effect goes away. hmmm. maybe my pp software doing something funky with it? Merely cropping makes it go away? That seems unlikely. Resizing the image definitely makes a lot of effects go away or be less noticeable, which is the whole reason people ask to see crops - so the image is not resized and yet still fits on the screen.

02-16-2009, 06:24 AM	#5
rburgoss Veteran Member Join Date: May 2008 Location: San Jose, Costa Rica Photos: Gallery \| Albums Posts: 972	Originally posted by Dice I took some photos yesterday and upon uploading them to flickr noticed a regular square pattern in the foliage, bark most areas. I'm not sure if this is my fault or something else. I'm looking for some help. Here is the link to the flickr page Mt Diablo Snow - a set on Flickr If you run the slide show I think it shows it pretty well. kevin Even thugh your link shows nothing here, I can say there are two kinks of moire effects. First one is produced in camera, when certain patterns are pictured and the "cadence" of such patterns closely matches the cadence of the sensor's pixels. This WAS usual with 1 to 3 megapix cameras with very sharp glass, shooting things like fabrics, tight screens (mosquito nets) and such. This type of moire pattern is actually in the pictures and will not go away by resizing unless you are creating thumbnails, in which such pattern is so greatly reduced in resolution that it turns into a blob. The other is produced in your computer screen, when the actual pattern pictured is showed at a certain resolution, that closely matched your screens resolution. This moire pattern goes away if picture is resized or by simply enlarging or reducing in screen. You can tell if this is your case when the moire pattern "changes" its appeareance when you enlarge or reduce picture in screen. I believe this is your case. Such moire pattern may well be not showing on everyone's screen. You simply, by accident, resized your picture in which a photographed pattern closely matched your screen's resolution. A simple test to discard this, is to actually print the picture (high quality) by lab or inkjet with photo paper. I am almost shure the moire pattern will not show on the print.