source:other news release time:2023-10-13 Hits: Popular:led screen wholesaler
1. Grayscale image testing
(1) Gray scale and color scale testing have always been important indicators for DLP/Plasma/LCD/LED large screens or splicing large screens, used to evaluate the splicing ability of full color LED displays, the grayscale transition ability of controllers (if any), and the black and white conversion ability. The more obvious the contrast, the stronger the display system's ability to process color images.
The bidirectional grayscale signal is used to test at least 16 grayscales that the system should display. There are 3 points that can be distinguished at each level, with a decrease of one point and a decrease of one point. The lowest point is 0. The 25+2 grayscale image must be able to distinguish the three darkest grayscales a, b, and c on the screen at the same time, as well as the three brightest grayscales u, v, wa, and b, and c must have layers and cannot appear black; Similarly, there are layers of u, v, and w that cannot appear white. During playback, large screen images with any color/partial color should be deducted. If there is no color difference (impure black and white and other colors), 2 points will be added. If it is in color, 1-2 points can be deducted as appropriate.
2. Comprehensive test of clarity and grayscale. This scenario is used for comprehensive testing of the performance of the entire system, such as line number, grayscale, geometric distortion, etc. At 1080p (1920 × At 1080, each grayscale and spectral line number should be clearly distinguishable, and the black and white purity of the grayscale can be detected. Reducing one point is problematic; Reduce at least 1 point.
3. Grayscale realistic image. Displayed a darker and whiter level, which better reflects the system's grayscale processing ability. The minimum score is 2 points, and the maximum score is 5 points.
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