This is a follow-up to my article on HDTV screen resolution vs a persons ability to perceive any advantage. Before the link to the test pattern, I want to make it clear that the results vary greatly with the content. With an anti-aliased image (i.e. a photograph of a person with many color gradients), it would be much more difficult to detect a single pixel. With a non-anti-aliased image (solid single-color lines), pixels become much more apparent.
To allow everyone to conduct a simple test for themselves, I created a sample a page that is half-way in between the scenarios described above. It is a pixel-by-pixel black and white checkerboard background covering the entire page. When you are very close to the screen, you can tell it is 1-pixel by 1-pixel black & white checkerboard. Farther away, it looks like a gray box. The idea is that you find the distance at which it looks like a gray box, and that is the visual acuity viewing distance for your display.
Disclaimer: this test page is designed to work only on an LCD monitor with pixel-perfect rendering. In other words, the LCD monitor must be running at its native resolution. If you have an analog LCD or a CRT monitor, this test will not work. If it works, you’ll see a page entirely covered with an extremely tiny pixel-by-pixel checkerboard. If it doesn’t work on your monitor, you’ll see a wavy red-green-blue shifting pattern that it totally useless.
Here is the link to the pixel-by-pixel test pattern for LCD monitors:
Determining your Visual Acuity Viewing Distance: The point at which you stop seeing a black and white checkerboard and see instead a gray box is the visual acuity viewing distance for your LCD monitor and your eyeball.
So, what is your visual acuity viewing distance? I’m interested to see the results others get. Please include the following in your comment:
- Your LCD monitor native resolution
- Your screen size (diagonal)
- Your Visual Acuity Viewing Distance
Here is some high-magnification photographic proof that this is a perfect pixel-by-pixel checkerboard (at least on my monitor).