Loading an lut into the camera, Chapter – ALLIED Vision Technologies Guppy F-503 User Manual
Page 132
Description of the data path
GUPPY Technical Manual V7.1.0
132
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
•
The input value is the 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 overridden
when gamma is enabled.
•
Guppy F-036 (CMOS model) has the gamma function
built in the sensor, so that it will not be overridden.
•
Guppy F-503 (CMOS model) behaves like Guppy CCD
cameras.
•
LUT content is volatile.
Figure 70: Loading an LUT
Note
Configuration
•
To configure this feature in an advanced register: See
Table 119: Advanced register: LUT
•
Information on GPDATA_BUFFER: See Chapter
Query Limits from
Register:
LUT_INFO and
GPDATA_INFO
Set EnableMemWR
to true (1)
Set AddrOffset to 0
Write LUT data in
GPDATA_BUFER
Set EnableMemWR
to false (0)