LUT Setup Procedure

Disabling the lookup table

To disable the lookup table:

● Set the LUTEnable feature to a Off.

Defining the lookup table configuration

To define the lookup table configuration, set the LUTConfiguration feature according to:

●

The camera pixel type and bit depth

●

The required output bit depth.

Refer to Monochrome Lookup Table Processing for configurations applicable to monochrome pixels.

Note: The lookup table configuration must be set prior to any other action.

Defining the lookup table content

Refer to LUT Content Definition for a description of the parametric and tabular methods used for defining a lookup table content.

Note: At least one lookup table set must defined.

Upload a lookup table content

To upload a lookup table content in one operation:

● Select a lookup table data set to access by assigning the appropriate value to the LUTSet feature. For instance Set1.

● Set the LUTIndex feature to 0.

● Write a string of LUTLength values to the LUTValue feature.

Note: The application may also selectively upload any individual lookup table entry or any block of consecutive lookup table entries.

Reading back a lookup table data set

To read back the lookup table data set in one operation:

● Select a lookup table data set to access by assigning the appropriate value to the LUTSet feature. For instance Set1.

● Set the LUTIndex feature to 0.

● Set the LUTReadBlockLength feature to the value returned by LUTLength.

● Get a string of LUTReadBlockLength values from the LUTValue feature.

Note: The application may also selectively read any lookup table entry individually or any block of consecutive entries.

Enabling the lookup table

To enable the lookup table:

● Set the LUTEnable feature to a value designating the lookup table data set to use.

Configuration Script Example

The following script is an example illustrating how to configure the lookup table for monochrome 8-bit to 8-bit operation and to define and upload 4 lookup table data sets using different lookup table definition methods.

function configure(g) {
    // Disable the lookup table
    g.StreamPort.set('LUTEnable', 'Off');
    // Configure the lookup table
    g.StreamPort.set('LUTConfiguration', 'M_8x8');

    // Build lookup table data set 1: response control
    g.StreamPort.set('LUTSet', 'Set1');
    require('coaxlink://lut/response-control')(g, { Contrast: 0.94
                                                  , Brightness: 0.14
                                                  , Visibility: 0.25
                                                  , Negative: false });

    // Build lookup table data set 2: emphasis
    g.StreamPort.set('LUTSet', 'Set2');
    require('coaxlink://lut/emphasis')(g, { Emphasis: 0.5
                                          , Negative: true });

    // Build lookup table data set 3: threshold
    g.StreamPort.set('LUTSet', 'Set3');
    require('coaxlink://lut/threshold')(g, { SlicingLevel:  0.5
                                           , SlicingBand:   0.5
                                           , LightResponse: 0.75
                                           , BandResponse:  0.5
                                           , DarkResponse:  0.25 });

    // Build lookup table data set 4: table
    g.StreamPort.set('LUTSet', 'Set4');
    var i;
    for (i = 0; i < 256; ++i) {
        g.StreamPort.set('LUTIndex', i);
        g.StreamPort.set('LUTValue', String(255 - i));
    }
}
configure(grabbers[0]);