Test Image Two; Guidelines When Using Test Images - Basler L100k User Manual

Operation and Features

3.9.2 Test Image Two

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 3-14. 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.
This pattern moves up by one pixel each time the ExSync signal cycles. At pixel 1 of the second
cycle, the new gradient starts with a gray value of 1, the gray value of pixel 2 is 2, the gray value
of pixel 3 is 3, and so forth.
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 frame grabber
grabs every single line that is output from your camera.
Figure 3-14: Formation of Test Image Two
Figure 3-15: Test Image Two

3.9.3 Guidelines When Using Test Images

When using a test image, please take the following guidelines into account:
• If the camera is set for an exposure mode that uses an ExSync signal, the ExSync signal
must be present and must toggle in order to output a line on the test image. Multiple transi-
tions of the ExSync signal will produce a two dimensional image as shown in Figure 3-13 or
Figure 3-15.
• If the camera is set for Free-run, each cycle of the camera's internal control signal will trigger
the output of a line on the test image.
• When the test image is active, the gain, offset and exposure time have no effect on the
image.
• Digital shift makes the test image appear very light, therefore, digital shift should be disabled
when the test image is active.
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DRAFT
BASLER L100
k Series