Basler Vision Technologies Sprint Series, User Manual

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Features
134 Basler sprint Mono Cameras
6.4.2 Test Image Two (Moving Gradient)
Test image two is formed with a gray scale gradient that ranges from 0 to 255 and repeats every
256 pixels as shown in Figure 45. The gradient starts at 0 and steps up, that is, the gray value of
pixel 1 is 0, the gray value of pixel 2 is 1, the gray value of pixel 3 is 2, and so forth.
The pattern shifts by one pixel each time the ExSync signal or the camera’s internal control signal
cycles. On the second cycle, the gray value of pixel 1 is 1, the gray value of pixel 2 is 2, the gray
value of pixel 3 is 3, and so on. On the third cycle, the gray value of pixel 1 is 2, the gray value of
pixel 2 is 3, the gray value of pixel 3 is 4, and so on. This shifting of the gradient makes the pattern
appear to be moving as the ExSync signal or the internal control signal cycles.
When you view the output of a camera that is set for test image two, the pattern should appear to
be gradually moving up the screen. This feature is useful for determining if the camera is receiving
an ExSync signal from your frame grabber and if the frame grabber is receiving every line that is
output from your camera.
Fig. 45: Formation of Test Image Two on a Camera with 4096 Pixels Per Line
Fig. 46: Test Image Two
Note
When the camera is set for an 8 bit output mode, the pixel values in test image
one range from 0 to 255 as described above.
If the camera is set for 10 bit output, the pixel values will range from 0 to 1023.
If the camera is set for 12 bit output, the pixel values will range from 0 to 4095.