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#Actualaregee

Posted 06 February 2014 - 09:34 AM

See:

 

https://www.google.no/search?q=moire+pattern&espv=210&es_sm=119&source=lnms&tbm=isch&sa=X&ei=4KTzUqDvDOrMygPYhoGIBw&sqi=2&ved=0CAcQ_AUoAQ&biw=1920&bih=898

 

On any of those pictures:

 

Since the TV that I use with my computer has a resolution that doesn't quite match up with the natural resolution of the graphic card, I get Moire patterns exactly like yours when I have zoomed completely out.  When I zoom in, the pattern disappear.  The pictures are static.  (CTRL + mouse scroll on Mac to zoom, or what you have configured.  Not sure how to activate on Windows any more.)

 

You will probably not see the same result, unless you pick a resolution that does not quite match up with the resolution on the screen, but the reason is the same: ALIASING.  Aliasing makes Moire patterns.

 

Aliasing happens when you show high frequency data on a low(er) frequency medium.

 

Have a look here: http://www.svi.nl/AliasingArtifacts

 

Even TV / video producers avoid having certain clothes to avoid aliasing effects.  You don't often see clothes with high contrast horizontal stripes, for instance: http://www.assetmediagroup.com/what-to-wear-for-video-shoot.html


#2aregee

Posted 06 February 2014 - 09:27 AM

See:

 

https://www.google.no/search?q=moire+pattern&espv=210&es_sm=119&source=lnms&tbm=isch&sa=X&ei=4KTzUqDvDOrMygPYhoGIBw&sqi=2&ved=0CAcQ_AUoAQ&biw=1920&bih=898

 

On any of those pictures:

 

Since the TV that I use with my computer has a resolution that doesn't quite match up with the natural resolution of the graphic card, I get Moire patterns exactly like yours when I have zoomed completely out.  When I zoom in, the pattern disappear.  The pictures are static.  (CTRL + mouse scroll on Mac to zoom, or what you have configured.  Not sure how to activate on Windows any more.)

 

You will probably not see the same result, unless you pick a resolution that does not quite match up with the resolution on the screen, but the reason is the same: ALIASING.  Aliasing makes Moire patterns.

 

Aliasing happens when you show high frequency data on a low(er) frequency medium.

 

Have a look here: http://www.svi.nl/AliasingArtifacts


#1aregee

Posted 06 February 2014 - 09:23 AM

See:

 

https://www.google.no/search?q=moire+pattern&espv=210&es_sm=119&source=lnms&tbm=isch&sa=X&ei=4KTzUqDvDOrMygPYhoGIBw&sqi=2&ved=0CAcQ_AUoAQ&biw=1920&bih=898

 

On any of those pictures:

 

Since the TV that I use with my computer has a resolution that doesn't quite match up with the natural resolution of the graphic card, I get Moire patterns exactly like yours when I have zoomed completely out.  When I zoom in, the pattern disappear.  The pictures are static.  (CTRL + mouse scroll on my Mac.)

 

You will probably not see the same result, unless you pick a resolution that does not quite match up with the resolution on the screen, but the reason is the same: ALIASING.  Aliasing makes Moire patterns.

 

Aliasing happens when you show high frequency data on a low(er) frequency medium.

 

Have a look here: http://www.svi.nl/AliasingArtifacts


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