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10
LINLOG
In the LINLOG mode the pixel response can be influenced to prevent pixel saturation. At
low intensities, each pixel has a linear response. Once a threshold of charge collected is
reached, the pixel changes its response to a logarithmic compression. This prevents the
saturation of the pixel response and permits an extremely high intra scene dynamic above
120dB. The threshold when
the pixel passes from a linear
to a logarithmic response is
programmable by software.
Special care has been
invested to keep this
transition continuous and
smooth. The LINLOG
response is compatible with
the global shutter technique
(all pixels are exposed at the
same time) which prevents
motion artefacts known from
classical logarithmic sensors.
The LINLOG technology
further overcomes image lag,
or ghost images related to the
slow response speed of pure
logarithmic sensors. The
LINLOG response is best
suited for application with
uncontrolled illumination conditions or high intrascene contrasts where a high pixel
response is needed. Welding and traffic management are two application examples best
suited for the LINLOG response.
LINLOG values are set using the PFRemote configuration tool. See section 3.2 PFRemote
Configuration Tool for details.
LINLOG Parameter Adjustment Procedure
There is no direct formula for the interactions of LL1, LL2, and COMP. To determine
optimal settings, use the flowchart on the next page.
03-32-00525-03
PRELIMINARY
TM
response
Response
20
18
16
14
12
10
8
6
4
2
0
0
5
10
TM
LINLOG
Transition
1M28 and 1M75 User's Manual
TM
LINLOG
response
Logarithmic
response
15
20
25
Intensity
DALSA
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