Introduction to Geometry/Coincidence Test Card

The geometry/coincidence test card has 23 horizontal and 53 vertical linear grids on a striped background. Three grid lines divide the periphery into three rows of grids from the middle. The width of the grid lines is 0.15% of the image width. The diameter of the large circular line is 83, which is 1/3 of the image height, and the diameter of the five small circular lines is 25% of the image height.

4 resolution wedges are distributed at 0 °, 45 °, 90 °, and 135 ° of the large circle, corresponding to 2-10MHz signal frequencies (marked with 8 MHz and 600 lines).

Geometric/Coincidence Test Card Application

• This test card is specifically designed for operational adjustment and control of TV cameras.
• The linear scan of the circle can provide a rough visual assessment.
• The function of gridlines is to adjust positioning.
• The function of a wedge is to test resolution.