Test Image Two; Test Image Three - Basler A202K Manual

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 two vertical
gradients on the left side of the image and
four horizontal gradients on the right side.
Test image three is useful for determining if
your frame grabber has dropped any
columns or lines from your image.
Vertical Gradients
The two vertical gradients on the left side of
the image are a total of 502 columns wide.
The left vertical gradient begins on column 1.
The pixels in column 1 have a value of 10,
the pixels in column 2 have a value of 11, the
pixels in column 3 have a value of 12, and so
on. This pattern continues until column 246,
where the pixels have a value of 255.
The second vertical gradient begins in
Figure 3-16: Test Pattern Three
column 247. The pixels in column 247 have
a value of 0, the pixels in column 248 have a
value of 1, the pixels in column 249 have a value of 2, and so on. This pattern continues until
column 502 where the pixels have a value of 255.
Horizontal Gradients
All of the horizontal gradients on the right side of the image are 502 columns wide.
The pixels in the bottom line of the bottom gradient (image line 1) have a gray value of 235, the
pixels in line 2 have a gray value of 234, the pixels in line 3 have a gray vale of 233, and so on.
This pattern continues until line 236 where the pixels have a gray value of 0.
The second gradient begins on line 237. The pixels in line 237 have a gray value of 255, the pixels
in line 238 have a gray value of 254, the pixels in line 239 have a gray value of 253, and so on.
This pattern continues until line 492 where the pixels have a gray value of 0.
The third gradient begins on line 493. The pixels in line 493 have a gray value of 255, the pixels
in line 494 have a gray value of 254, the pixels in line 495 have a gray value of 253, and so on.
This pattern continues until line 748 where the pixels have a gray value of 0.
The top gradient begins on line 749. The pixels in line 749 have a gray value of 255, the pixels in
line 750 have a gray value of 254, the pixels in line 751 have a gray value of 253, and so on. This
pattern continues until line 1004 where the pixels have a gray value of 0.
3-31
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BASLER A202