Test Images - Basler A102K User Manual

Operation and Features

3.10 Test Images

The test image mode is used to check the camera's basic functionality and its ability to transmit
an image via the video data cable. The test image can be used for service purposes and for failure
diagnostics. In test mode, the image is generated with a software program and the camera's digital
devices and does not use the optics, CCD sensor, VGC or ADC. Three test images are available.
You can put the camera in test image mode using either the camera configuration tool CCT+ (see
Section 4.1 and the configuration tool's on-line help file) or binary commands (see Section 4.2).
With the CCT+, you use the Test Image setting on the Output tree to select the test image. With
binary commands, you use the Test Image command.
When a test image is active, the gain, offset, and exposure time have no effect on the
image.
Digital shift makes test images appear very light, therefore, digital shift should be dis-
abled when a test image is active.
Binning and Area of Interest will effect the appearance of test images.
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 for the camera to output test images.
3.10.1 Test Image One
Test image one consists of lines with repeated
gray scale gradients ranging from 0 to 255 (in
8 bit output mode) or 0 to 1023 (in 10 bit output
mode). The top line starts with a gray value of 0
on pixel 1. The second line starts with a gray
value of 1 on the pixel 1. The third line starts with
a gray value of 2 on the pixel 1, and so on. Line
256 (8 bit mode) or 1024 (10 bit mode) starts with
a gray value of 255 or 1023 on the pixel 1. Line
257 (8 bit mode) or 1025 (10 bit mode) restarts
with a gray value of 0 on the pixel 1, and so on.
Depending on the output mode selected on the
camera, either the 8 bit test image or the 10 bit
test image will be active.
If the camera is set for an exposure mode that
uses an ExSync signal, an ExSync signal is
required to output the test image. A test image
will be generated and transmitted on each cycle
of the ExSync signal.
If the camera is set for free-run, each cycle of the
camera's internal control signal will trigger the
transmission of a test image.
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Figure 3-20: Test Image One (8 bit mode)
Figure 3-21: Test Image One (10 bit mode)
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BASLER A102