Subtracting Background - Dalsa 4M30 User Manual

52

Subtracting Background

Purpose:
Syntax:
Syntax Elements:
Notes:
Related Commands:
Example
03-032-20044-01
Use the background subtract command if you want to improve
your image in a low contrast scene. It is useful for systems that
process 8 bit data but want to take advantage of the camera's 10 bit
digital processing chain. You should try to make your darkest
pixel in the scene equal to zero.
ssb t i
t
Sensor tap selection. Allowable range is 1 to 2, or 0 for all
taps.
i
Subtracted value in a range in DN from 0 to 511.
•
When subtracting a digital value from the digital video signal
the output can no longer reach its maximum. Use the
command to correct for this where:
ssg value =
max output value - ssb value
See the following section for details on the
•
Entering a large value background will cause the camera to
digitally clip the output image.
ssg
ssb 0 25
Falcon 4M Camera Manual
max output value
command.
ssg
ssg
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