Operation and Features
3-54 BASLER L304kc
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3.11.4 Test Image Two (Moving Gray Gradient)
Test image two is formed with a gradient that ranges from 0 to 255 and repeats every 256 pixels
as shown in Figure 3-30. In the first line, the red, green and blue values for pixel 1 are all 0, the
red, green and blue values for pixel 2 are all 1, the red, green and blue values for pixel 3 are all 2,
and so on.
The starting point of the pattern shifts by one pixel each time the ExSync signal or the camera’s
internal control signal cycles. On the second cycle, the red, green and blue values for pixel 1 are
all 1, the red, green and blue values for pixel 2 are all 2, the red, green and blue values for pixel
3 are all 3, and so on. On the third cycle, the red, green and blue values for pixel 1 are all 2, the
red, green and blue values for pixel 2 are all 3, the red, green and blue values for pixel 3 are all 4,
and so on. This shifting of the gradient makes the pattern appear to be moving as the ExSync sig-
nal 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.
Figure 3-30: Test Image Two
Figure 3-31: Formation of Test Image Two
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The description of the pixel values in test image two is only valid when the camera
is set for 8 bit output. If the camera is set for 10 bit output, the gradients range from
0 to 1023 and repeat every 1024 pixels
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