C5 Series User Manual Rev. 1.4
31
The FIR Filter Function
The FIR filter is a signal processing function aiming to increase the precision of laser line
detection in the sensor image. It consists of a digital Finite Impulse Response filter (FIR) and
can be operated in a smoothing or differentiating mode.
FIR in smoothing mode (in combination with MAX, TRSH and COG algorithms):
FIR in derivative mode (FIR PEAK):
Pre-defined templates with 5, 7 or 9 coefficients let the FIR filter to be customized to the
Gauss size and shape of the application.
More details regarding the operation of the FIR filter function can be found in
a separate application note.
Zero-Crossing of
First Derivative
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