Description of the data path
MARLIN Technical Manual
V2.4.0
83
Loading an LUT into the camera
Loading the LUT is carried out through the data exchange buffer called
GPDATA_BUFFER. As this buffer can hold a maximum of 2 kB, and a complete
LUT at 1024 x 8 bit is 1 kB, programming can take place in a one block write
step. The flow diagram below shows the sequence required to load data into
the camera.
Note
L
•
The input value is the most significant
10-bit
value
from the digitizer. The gamma LUT of the CCD models
outputs the most significant 8 bit as shown above.
•
As gamma correction for the CCD models is also imple-
mented via the look-up table, it is not possible to use a
different LUT when gamma correction is enabled.
•
With all CCD models, the user LUT will be overwritten
when Gamma is enabled and vice versa.
•
CMOS models have the gamma function built in the sen-
sor, so that it won’t be overwritten.
•
LUT content is by default volatile, use
user set func-
tionality
to store the LUT permanently in the camera.
Figure 41: Loading an LUT
Note
L
Configuration
•
To configure this feature in an advanced register: See
Table 107: Advanced register: LUT
on page 213.
•
For information on GPDATA_BUFFER: See Chapter
GPDATA_BUFFER
on page 235.
Query Limits from
Register:
LUT_INFO and
GPDATA_INFO
Set EnableMemWR
to true (1)
Set AddrOffset to 0
Write LUT data in
GPDATA_BUFFER
Set EnableMemWR
to false (0)
Содержание AVT Marlin
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Страница 87: ...Description of the data path MARLIN Technical Manual V2 4 0 87 Figure 44 Generation of shading image...