User Manual
Wildcat
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Page 28 of 58
Test patterns
The test pattern generator allows you to generate a predefined pattern in the pixel stream
instead of using the image sensor output. The test pattern generator operates internally in
a 9-bit range, but this can be bit-shifted to accommodate for the 16-bit camera output.
Acquisition Control
– Source
can be changed from
Detector
to
Test Pattern
to enable this
functionality. The corresponding camera registers may be found in Chapter 9.1.1.
There are 5 types of test patterns available which be selected using
Test pattern control
–
Selector
.
•
Solid value
: A fixed value used for all the pixels. The value can be entered using the
Solid value
field and is expressed as a 9-bit value.
•
X gradient
: Pixel value changes along the width. Pixel values are effectively the
column numbers (x coordinate) and therefore every pixel in a column will have the
same value.
•
Y gradient
: Pixel values changes along the direction of height. Pixel values are
effectively the row numbers (line number or y coordinate) and therefore the pixels in
a line will have the same value.
•
X xor Y gradient
: The pixel value at any point is the resultant of a logical XOR
operation between x and y coordinate (Column number XOR Row/Line number).
