Photon Focus OEM-D1024E, Руководство пользователя

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4 Functionality
4.3.2 LinLog
®
Overview
The LinLog
®
technology from Photonfocus allows a logarithmic compression of high light
intensities inside the pixel. In contrast to the classical non-integrating logarithmic pixel, the
LinLog
®
pixel is an integrating pixel with global shutter and the possibility to control the
transition between linear and logarithmic mode.
In situations involving high intrascene contrast, a compression of the upper grey level region
can be achieved with the LinLog
®
technology. At low intensities each pixel shows a linear
response. At high intensities the response changes to logarithmic compression (see Fig. 4.8).
The transition region between linear and logarithmic response can be smoothly adjusted by
software and is continuously differentiable and monotonic.
G r e y
V a l u e
L i g h t I n t e n s i t y
0 %
1 0 0 %
L i n e a r
R e s p o n s e
S a t u r a t i o n
W e a k c o m p r e s s i o n
V a l u e 2
S t r o n g c o m p r e s s i o n
V a l u e 1
R e s u l t i n g L i n l o g
R e s p o n s e
Figure 4.8: Resulting LinLog2 response curve
.
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