Configuration of the camera
STINGRAY Technical Manual
V2.2.0
265
Loading a look-up table into the camera
Loading a look-up table into the camera is done through the
GPDATA_BUFFER. Because the size of the GPDATA_BUFFER is smaller than a
complete look-up table the data must be written in multiple steps.
To load a lookup table into the camera:
1.
Query the limits and ranges by reading LUT_INFO and GPDATA_INFO.
2.
Set
EnableMemWR
to true (1).
3.
Set
AccessLutNo
to the desired number.
4.
Set
AddrOffset
to 0.
5.
Write n lookup table data bytes to GPDATA_BUFFER (n might be lower
than the size of the GPDATA_BUFFER; AddrOffset is automatically
adjusted inside the camera).
6.
Repeat step 5 until all data is written into the camera.
7.
Set
EnableMemWR
to false (0).
Note
L
The
BitsPerValue
field indicates how many bits are read from
the LUT for any gray-value read from the sensor. To determine
the number of bytes occupied for each gray-value round-up
the
BitsPerValue
field to the next byte boundary.
Examples:
•
BitsPerValue = 8
1 byte per gray-value
•
BitsPerValue = 14
2 byte per gray-value
Divide
MaxLutSize
by the number of bytes per gray-value in
order to get the number of bits read from the sensor.
Note
L
Stingray cameras have the gamma feature implemented via a
built-in look-up table. Therefore you can not use gamma and
your own look-up table at the same time. Nevertheless you
may combine a gamma look-up table into your own look-up
table.
Note
L
When using the LUT feature and the gamma feature pay
attention to the following:
•
gamma ON
look-up table is switched ON also
•
gamma OFF
look-up table is switched OFF also
•
look-up table OFF
gamma is switched OFF also
•
look-up table ON
gamma is switched OFF
