Testimerkki

Testimerkki, also known as a test pattern or test card, is a visual representation used to evaluate the performance of display devices, such as televisions, monitors, and projectors. It typically consists of a series of geometric shapes, color bars, and other patterns designed to test various aspects of display quality. The most well-known test pattern is the SMPTE color bars, which feature a gradient of colors and a white reference area. Other common patterns include the gray scale, which tests the display's ability to reproduce a range of grayscale values, and the resolution test pattern, which assesses the display's pixel density and clarity. Test patterns are widely used in the broadcast, film, and digital imaging industries to ensure that displays accurately reproduce images and videos. They are also used by consumers to check the quality of their display devices.