The Indian Head test pattern is a visual test card that was used in television broadcasting, primarily in the United States, from the 1930s to the 1970s. It features a central image of a Native American chief, surrounded by various geometric shapes and lines. This pattern was designed to help technicians adjust and calibrate television sets for optimal picture quality. The test pattern served multiple purposes, including checking the alignment of the screen and ensuring proper color reproduction. It was often displayed during off-air times or before programming began, allowing viewers to see how well their televisions were functioning.