[Contrast]     [Display settings]     [Clock and phase]     [Sharpness]     [Gamma calibration]     [Black level]     [White saturation]     [Gradient (banding)]     [Inversion (pixel-walk)]     [Response time]     [Viewing angle]     [Contrast ratio]     [Subpixel layout]  

Single-page version

This is the offline version of the Lagom LCD monitor test images. The online version can be found at


The online version is contains extensive descriptions of how to use the images. This offline version can be used on computers without an internet connection. This page and the accompanying images are copyright 2007, Han-Kwang Nienhuys. permission is granted to keep a copy of these images and this page for personal, noncommercial use. They are only available for download from www.lagom.nl/lcd-test. They may not be redistributed (e.g. placed online, on webforums, offered for sale, etc.) or used for commercial purposes. The image files and this document may not be modified.

Quick contrast test

All 32 bands should be distinguishable from each other and from the background.

Quick gamma
test image

Clock/phase calibration

Native resolution required.

Display settings


Adjust the sharpness such that all squares blend in. Native resolution required.

Sharpness test image

Gamma calibration

The stripes should blend in at value 2.2. Native resolution required.

Gamma calibration test image

Gradient test (banding test)

The gradient should be smooth without vertical lines or bands.

Gradient test

Black-level test

All squares should be distinguishable from the background, preferably without visible noise.

Contrast test

White saturation test

All squares should be distinguishable from the background.

White saturation

Inversion (pixel walk) test

One of the 9 boxes below may flicker slightly. The less is flickers, the better. Native resolution required.


Full-screen version below:

Current: none
Warning: do not click prev/next if you are sensitive to flicker.

Response-time test

Less flashing on the left means a shorter (faster) response time. Use the chart on the right for comparison. Native resolution required.

Response time test Response time reference chart

Viewing angle test

The colors below should change as little as possible with the viewing angle.






Contrast ratio

To measure the contrast ratio, please visit the contrast-ratio page.

Subpixel rendering

Check that the font display is optimal with subpixel smoothing. The edge in the colored square that appears as a black line points towards your subpixel layout.

© Copyright Han-Kwang Nienhuys, 2008. The text and accompanying images may not be redistributed. This includes placing the images on other websites, either as a copy or through hotlinking. Read more...

Last modified 18 May 2008