Description of the test monitor


monteon — online-service to test a computer monitor or screen mobile device. With the test screen you can easily adjust the settings on your monitor to get the best picture quality. A number of tests will help you assess the picture quality of the monitor. Even with the first test screen, you can calibrate your monitor, adjusting the brightness, contrast, clock phase, sharpness and gamma correction monitor.

Tests are best viewed in dim or dark ambient light and in full screen mode. When you run the tests will be automatically prompted to switch to full-screen mode. When moving the mouse pointer at the bottom of the screen will display the control panel tests. Use the controls on the panel, you can select the desired test, turn the slide (if prescribed test) back to the main page or off the full screen mode. On the left and right side of the screen when the mouse button displays the transition between tests. Controls for convenience disappear from the screen when there is no movement of the mouse pointer. Additionally, there are hot keys. To switch between test screens use the "Left", "Right" or "Space" or the mouse wheel. To rotate a slide - "Up" and "Down" to exit test - «Esc».

If you have installed any color management system, the existing operating system or additional graphics adjusted, it is recommended to disable them first. First we need to make adjustments to the settings of the monitor to its characteristics were as close to ideal as possible, and only then use any color management software to compensate for any small possible deviations or deficiencies.

The following describes how and what can be verified by testing the service monteon, you should pay attention to other helpful tips.

Colour reproduction

This classic pattern is used to check the setting of basic colors. At present special problems with color reproduction usually occurs (especially at the LCD monitor) so you probably do not even need to change these settings. This test can be used to verify that the correct monitor displays colors without any artifacts. If your monitor supports filters (or has a color filter), you can use these filters to verify that the monitor sends a clear color with no impurities (ie, for example, using a red filter, the red band should not change the shade).

Defective pixels

In modern monitors for color reproduction using an RGB (the abbreviation of English words Red, Green, Blue & mdash; red, green, blue). Each display pixel comprises three channels. Mixing these three colors in varying intensities produce different colors of the same intensity of & mdash; shades of gray. In a series of tests are color monochrome screen template. In these tests it uses only one particular color channel. Separately, a red screen, a separate green and blue separately.

These tests are in addition to the fullness of color channel make it possible to check on the dead pixels or as they are called — dead pixels . To check for dead pixels need to test on a single-color screen, carefully review the entire screen. It should not be black dots. Check each channel should be, because Each pixel consists of three channels. Therefore, it is not necessary that if one channel all is well, then the other will be all right. If you find a black dot on one of these tests — then you have found a dead pixel.

Specifically, a defect in even one of the channels of the pixel, will result in distortion of the color reproduction in a given pixel (point). The presence of several dead pixels is normal for old monitors, but the new one must not have such defects.

In this series of further tests are color mixing channels: yellow (red + green), magenta (red + blue), cyan (green + blue) and white (red + green + blue).


In this series of tests are presented on-screen patterns with smooth gradients. All gradients are displayed smoothly, without any stripes, lines, and the sharp color change. The bars appear if the monitor is not able to correctly reproduce the true colors and smooth transition. A good monitor will display a completely smooth transition.


Many VGA-screens need to be adjusted so called setting clock / phase (phase synchronization). These test images are best viewed in full screen mode. At a large distance from the monitor, they should look gray. On close examination should be clearly visible small contrasting pattern of alternating pixels (black and white).

When incorrectly configured sync, the image flickers or the impression "run of pixels." Or, if the picture is a solid gray color (not visible even at points close examination), or have black and white stripes (vertical or curved) it is also necessary adjustments.

Most monitors have the ability to automatically configure this setting. Usually it is called «Auto» or «AutoSet». Depending on the type of monitor can be manually adjust the options.


Sharpness is very important. Sharpness is responsible for the level of crispness in the edges between the light and dark areas. For example, if you think that the letters of the text are blurred, it is likely that the level of sharpness is not sufficient. By setting a certain level of sharpness on the display, you can get a nice eye for a picture or text. But excessive sharpness as bad as insufficient.

In contrast to the brightness, contrast, color and shade, there is no 'ideal' level of field. Because, at least in part, the perception and image sharpness optimal value depends on several factors, including how to display the screen size and how far you sit from the screen normally.

In the test, exemplified above, with sufficient sharpness you need to clearly see patterns in small shahmiatnom order. When nedostatovnoy field some squares merge into solid gray color. The center circle shall be clearly identified.

In another test, you should see clear pryamoguolniki and lines without the blurry edges, ghosting and other artifacts. Diagonal lines should also be smooth.

Contrast and brightness

In this series of tests on the images you need to see clear boundaries between the strips and squares. If some areas merge and become one color, or not visible in the background at all, it means that you need to adjust the brightness and contrast. On a good monitor, you should see a brightness level equal to around predstavlennorm tests range in all colors.

Band brightness

This test is a good way to check the level of the overall brightness of reproduction, and not a bad check pattern definition. The central part of the screen should look smooth and clean. Further from the center towards the edges, contours must STANOVOY more and more sharp and less smooth. Towards the edges of the screen may appear false imaginary concentric circles. If these circuits ovate or oval, then something is wrong. In the corners of the screen it is possible a small, almost imperceptible decline in brightness. If the brightness of a large decline or all blends, it is not so good.

Geometry and Grids

These tests are designed to verify the correct geometry of inscribed and monitor playback picture.

Clipping image

Not every display is actually shows you each pixel, which is transmitted graphics monitor. This test will show you how the image of the absent. If the monitor is set up correctly, you should see the white line on the outer edge of the numbered boxes around the edge of the screen. If some are missing pryamougolnikv outer white line at the edge of the screen, it means that the edge of the image is cropped. Room at such clipped rectangle indicates how many pixels are missing on this side of the screen.

Format 16:9

Test exemplified above, for verification widescreen display with an aspect ratio of 16: 9. Here you should see a grid of 16 equal squares horizontally and 9 of the same squares vertically. In the corners should be visible circle the correct form. If you do not see them, or they are cut off or distorted, your monitor does not support any appropriate mode, or you must configure the scaling of the image, which can be in the service menu screen.

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