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Fix moiré on some monitors with a checkerboard pattern Other Hardware
I had been noticing that my older monitor was blurry in a few spots (in two columns down the screen). I realize now that this was a problem with moiré. To see more clearly how it was working, I opened GraphicConverter and created a black-and-white checkerboard pattern. I saw exactly where it was blurry, and I went to adjust the settings on my display. I tried hitting the 'Auto' button and this fixed the problem, even though this had no effect without the image on the screen —- I guess this pattern gives a better signal so that the display can calibrate properly.

I've created a 1024x768 checkerboard GIF -- this compresses down to an 8KB ZIP file, so that's how I'm making it available.

[robg adds: Here's a macosxhints mirror of the file, in case the above download link no longer works.]
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Fix moiré on some monitors with a checkerboard pattern | 5 comments | Create New Account
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Only for analog LCDs
Authored by: dbs on Jun 09, '06 08:57:05AM

This hint will only help with Analog LCDs because they have to try and sync to the analog signal, which is not precise. Any digitally-connected LCD should not display this behavior, and if it does it probably means it's either not being driven at its native resolution or is broken.



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Fix moiré on some monitors with a checkerboard pattern
Authored by: pub3abn on Jun 09, '06 09:33:17AM

The checkboard looks absolutely great on my Formac and Apple LCD displays. I had fun playing with it. I noticed that while I drag the Preview picture window around on the Formac, the checkerboard turns slightly greenish in hue, whereas on the Apple it turns kind of reddish. Also, it looks solid from a distance, but viewed up close all kinds of freaky ripple effects zip around (evidently an optical illusion, rather than something intrinsic to the hardware).

In 2001 I created something similar, which you can download from here: calibration-wallpaper-1024.png. It doesn't test the whole screen in the same way, but it tests for more things. The top left corner is the same as what this person posted; the one to the right of it has broken lines (if the horizontal or vertical lines appear NOT broken, something in your monitor's pixel alignment needs to be adjusted); the next is vertical lines; the next row down has a finer dot grid, then horizontal, and finally diagonal lines. The top left, top right, and bottom middle grid should all appear the same shade of gray from a distance. There are also RGB and CMY squares to test color purity.

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Fix moiré on some monitors with a checkerboard pattern
Authored by: DistantThunder on Nov 12, '08 08:13:17PM
The above referenced image is now available here:
http://michaelprewitt.com/2008/11/calibration-wallpaper-916/


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Fix moiré on some monitors with a checkerboard pattern
Authored by: jaysoffian on Jun 09, '06 11:28:18AM
Have fun with patterns that will drive your LCD nuts:

http://www.techmind.org/lcd/

j.

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Fix moiré on some monitors with a checkerboard pattern
Authored by: vindu on Jun 12, '06 06:22:01PM

A fun thing to do with these test-card patterns is to activate Exposé with the shift key held down. You get slow-motion resizing, and hence slow-motion interference effects.

cheers
Vin



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