Test Images - Basler A101f User Manual

Operation and Features

3.9 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 mode 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 different
test images are available.
Test images are an advanced feature. The test images are enabled by setting the ImageOn field
of the TEST_IMAGE advanced features register (see page 4-13). To enable test image one, set
the field to 1. To enable test image two, set the field to 2. To enable test image three, set the field
to 3. To disable the test image feature, set the field to 0.
When a test image is active, the gain, brightness, and exposure time have no effect on the image.
Test Image one
As shown in Figure 3-13, test image one consists of lines with several gray scale gradients ranging
from 0 to 255. If the camera is operating at full 1300 x 1030 resolution when the test images are
generated:
• the first line starts with a gray value of 0 for the first pixel,
• the second line starts with a gray value 1 for the first pixel,
• the third line starts with a gray value of 2 for the first pixel, and so on.
(If the camera is operating at a lower resolution when the test images are generated, the basic
appearance of the test pattern will be similar to Figure 3-13, but the staring pixel values on each
line will not be as described above.)
The mathematical expression for test image one is:
Figure 3-13: Test Image One
3-16
DRAFT
grayvalue = [ x + y ] MOD256
f
BASLER A101