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DRAFT
Operation and Features
3.10.2 Test Image Two
The basic pattern of test image two is similar to test image one. However, with test image two, the
pattern of the image moves up by one pixel each time the ExSync 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 you camera is receiving and reacting
to an ExSync signal.
If the camera is set for free-run, each cycle of the camera's internal control signal will cause the
pattern of the test image to move up by one pixel.
3.10.3 Test Image Three
Test image three contains vertical gradients on
the left side of the image (columns 1 to 696) and
horizontal gradients on the right side (columns
697 to 1392). Test image three is useful for
determining if your frame grabber has dropped
any columns or lines from your image.
Vertical Gradients
A full vertical gradient is 256 columns (8 bit
mode) or 1024 columns (10 bit mode) wide.
The vertical gradient(s) on the left side of the
Figure 3-22: Test Image Three (8 bit mode)
image are a total of 696 columns wide.
The left vertical gradient begins on column 1. The
pixels in column 1 have a value of 0, the pixels in
column 2 have a value of 1, the pixels in column
3 have a value of 2, and so on. This pattern
continues until column 256 (8 bit mode), where
the pixels have a value of 255, or column 696 (10
bit mode), where the pixels have a value of 695.
In 8 bit mode, a second vertical gradient begins
in column 257. The pixels in column 257 have a
value of 0, the pixels in column 258 have a value
of 1, the pixels in column 259 have a value of 2,
Figure 3-23: Test Image Three (10 bit mode
and so on. This pattern continues until column
512 where the pixels have a value of 255.
In 8 bit mode, a third vertical gradient begins in column 513. The pixels in column 513 have a value
of 0, the pixels in column 514 have a value of 1, the pixels in column 515 have a value of 2, and
so on. This pattern continues until column 696 where the pixels have a value of 183.
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BASLER A102
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