® 16k CXP
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UM 16k CXP – Indice E - 06/13
e2v semiconductors SAS 2013
6.2.8
Look Up Table
The User can define an upload a LUT in the Camera that can be used at the end of the processing.
The LUT is defined as a correspondence between each of the 4096 gray levels (in 12 bits) with another
outputted value. For example, a “negative” or “reverse” LUT is the following equivalence :
Real value
Output value
0
4095
1
4094
2
4093
…
Then the size of each value is 12bits but the exchanges with the Application/PC are done on 16 bits :
For 4096 gray levels (from 0 to 4095) the total file size for a LUT is 8Ko.
If this LUT is enables, the “Contrast Expansion” feature (digital Gain and Offset) will be disabled
Feature
Description
LUTEnable
0
: Disable LUT (“False”)
1
: Enable LUT (“True”)
LUTValueAll
Memory containing LUT on 12 bits
Size=2
12
x 2
LUTValueSize
Integer providing LUT value size in byte
LUT User Bank Usage
User1
User2
User3
User4
User
At the power up :
- Last User Bank used is loaded in RAM
Ram Memory
Save
Load
Upload/load from/to a Txt file