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8.15 Command NK – Knee function enable/disable
This command turns the knee function on or off.
The sensor output is digitized to 4095LSB of dynamic range. When input (CCD output) and
output (Camera link data) relations is set at linear, the output is clipped at 1023 LSB and
the details above 1023 are not visible. This function changes the gain signal from CCD over
100% video output level and compress signal up to 4095 LSB. The knee point is the upper
limit of linear relations between CCD output and input to Camera Link. The knee slope
decides how much of the signal above 100% video output is compressed. Knee point and
Knee slope can be set on R, G and B respectively.
Fig. 14 Principle of Knee function
Settings:
0=off, 1=on
Associated functions:
Commands KSR, KSG and KSB – Knee slope for R, G and B
Commands KPR, KPG and KPG – Knee point for R, G and B
8.16 Commands KSR, KSG and KSB – Knee slope for R, G and B
See command KN for description of this function
Settings:
-8192 to 8191
Associated functions
Command KN, Commands KPR, KPG and KPG
8.17 Commands KPR, KPG and KPG – Knee point for R, G and B
See command KN for description of this function
Settings:
0 to 1023
Associated functions:
Command KN, Commands KSR, KSG and KSB
8.18 Command LR - Line Rate (Scan Rate)
This function is used only when there is not external trigger pulse (e.g. from an encoder)
available. It allows the user to program the line rate, in order to match the speed of the
object being scanned. In the No-Shutter mode, the exposure time is directly proportional
to the line rate (T
exp
= 1/line rate)
