is this Moire?

[Fotomiguel]

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I'm not a Digital photography expert at all. In the next picture I've notice that strange things happen in the curtains.

 

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You may see the crop below. Some kind of colours over the white. Also working with photoshop 4 and zooming over the curtains the picture do strange things. I thing that my monitor can't show the picture right, depending on how much I zoom. Is there normal? how can I correct this?

Thank you very much in advance!

Cheers!

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[rwfreund]

Yes it is, but it might have nothing to do with the digital sensor.

Any time there is more than one competing grid, then there is the possibility of moire.

In the case of the curtains, there are two competing grids due to the slightly crossed double layers of fabric.

You might have seen moire even on film with this.

-bob

[Artichoke]

this happens with high resolution cameras & will change with how the resolution is adjusted on your monitor ...undersampling will produce moiré

moiré is complex ...some occurs in nature & some is a consequence of the digitizing process ...there are many fine discussions of moiré on the 'net ...I find the one in Wikipedia particularly enlightening

moiré is usually simple to deal with in PS, though not always & there are many solutions for this available ...I find Paul W. Walters simple PS action works best for most circumstances ...it can be found here Untitled Document

hope this helps

[Lode]

It's more and has nothing to do with the lens.

All Bayer sensors (CFA) are sensitive to moire. A AA filter blurs the image in order to decrease this sensitivity.

Leica have chosen for highest sharpness, therefore on a Leica M8 sensor the AA filter (only a IR-filter) is thinner than other brands. I think it was the right choice because moire is rare phenomenon and a thicker filter doesn't exclude moire as illustrated in this link.

 

http://www.fujifilm.co.uk/digital/cameras/ten_things/downloads/Guide_to_image_quality.pdf

[egibaud]

Leica's tip and trick against this kind of moiré is dead simple. Change curtains!

[andybarton]

You can see this effect with the naked eye with net curtains such as these.

[l.ceva]

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You can see this effect with the naked eye with net curtains such as these.

 

I really don't think you can see color moirè, as the one showed in the picture, with the naked eye unless you have a digital eye!

 

ciao

 

Lorenzo

 

http://www.lorenzocevavalla.it

[andybarton]

Maybe not, but you can see the same effect with net curtains.

[Jamie Roberts]

One very good way to fix this is with the Capture One moire plugin for PS. Since I have C1 Pro, that's what I use--does it come with C1 LE?

[tashley]

Trust the eyes of non-photographers to delete it. It's a nice shot, people will like it and won't notice the moire. Unless you're doing packshots for Versace or somesuch, or weddings. For weddings I hear moire is a nightmare. So don't shoot weddings! We are constrained by technology...

 

Tim