Video Test Files
-by David Carlstrom

These files help you learn about the capabilities of your 640 x 480 computer display, TV monitor, or the computer device that outputs the video signal. To use these files, click on the small images below. Your web browser will display the image in the correct size. When the full size image is on the screen you may save the image for later use. Be sure to display the image at the correct size when using it. The files are 640 by 480.
Test file 1 tests the size of vertical line your output device or display can show in black and white or color. The numeric resolution scale is calibrated in TV lines. Computer devices should show the narrow bottom end of the wedge clearly. TV displays may not show the bottom of the wedge as well, particularly in the color wedge. The color wedge should appear to be exactly the same size and shape as the black wedge. Some TV displays may show the bottom of the color wedge a lot wider than it is.	Test file 2 tests resolution with repeating patterns and also tests color fit. The full height vertical lines make for a clear oscilloscope display to check display card outputs. The three color bars at the left tests color fit. The colored bars should not be left or right of the black spots between them. This type of error is unlikely in computer displays, but may appear on TV displays. From left to right, the black and white lines require resolutions of 60, 120, 240, and 480 TV lines. Seeing the orange and green lines requires resolution of 60, 120, and 30 lines. TV displays may have trouble resolving 120 lines in color. This is normal for NTSC TV monitors. Some TV displays will resolve the orange lines at 120, but not the green lines. Since these files are JPEG compressed, the color stripes of this file are not perfectly sharp on computer monitors but should be fully resolved.