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Camera Performance and Features
Linea HS 32k CMOS TDI Cameras
Customized Linearity Response (LUT)
See the section Camera Control Category in Appendix A for GenICam features associated with this
section and how to use them
Note: These features may only be useful in applications that use the frame grabber’s
Mono Image Buffer Format.
The camera allows the user to access a LUT (Look Up Table) to allow the user to customize the
linearity of how the camera responds. This can be done by uploading a LUT to the camera using
the file transfer features or by using the gammaCorrection feature.
The gamma correction value can be adjusted by the user at any time.
When the LUT is enabled, there is no change in maximum line rate or amount of data output from
the camera. The LUT can be used with any mode of the camera. Further, when the LUT is enabled,
it is recommended that the fixed Offset available in the Camera Control category be set to zero.
To upload a LUT, use File Access Control Category > Upload / Download File > Settings and select
Look Up Table to upload a file.
The file format is described in 03-084-20133 Linea Binary File
Format which can be obtained from
Teledyne DALSA Technical Support. This document also includes Excel spreadsheet examples.
How to Generate LUT with CamExpert
CamExpert can also be used to create a LUT file. The camera uses a 12-bit in / 12-bit out LUT
(even though the camera is outputting an 8-bit image). CamExpert can be configured to create a
12-bit in / 16-bit out LUT - the camera will convert it to the required format.
1.
Open CamExpert > version 8.40.
2.
Device should be an Xtium2 connected to a Linea camera.
3.
Under Board select Basic Timing and set Pixel Depth to 12.
4.
Under Board select Image Buffer and ROI and set Image Buffer Format to Monochrome 16
bits
5.
Leave Image Buffer and ROI selected.
6.
In the top menu select Pre-Processing | Lookup Table and set Enable.
7.
In the same menu select Setting…
8.
Configure the output LUT here by scrolling through the different options under Value.
a.
Some selections have additional parameters to configure (e.g. Gamma correction
requires a Correction factor).
9.
Click on the Save LUT button to create a LUT file.
10.
This file can loaded into the camera using the File Access features. It is saved with the current
Load / Save Configuration user set; ensure that a user set and not the factory set is selected,
otherwise the upload will fail.
11.
Deselect the Lookup Table | Enable feature.
12.
Return CamExpert to Pixel Depth = 8, and Image Buffer = 8 bits.
