AJA Control Panel Function Screens
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Uploading Custom User LUT file
Once the LUT file is created, you can upload it with the following steps:
1. Before loading a LUT, make sure you are using an RGB/RGBA frame buffer format, and that
you have a AJA Video Device that supports LUTs.
2. Open AJA Control Panel and select the “LUT” pane.
3. Click the “LUT Type” popup and choose “User LUT File” menu item. Note “LUT Files” options
become enabled.
4. Click the “+” button and use the navigation dialog to choose a custom LUT file. The LUT is now
loaded.
LUT File Format Specification
LUT files are normal text files that contain 1025 lines (numbered 0 - 1024). Each line contains 3
integer values in the range 0 - 1023, representing 10 bit R, G, B component output values.
Component values may be separated by one or more commas, spaces, or tabs. The example below
show LUT File contents for Line 0, Line 1, Line 2, and Line 1024, with several valid ways to separate
the numbers in a line.
•
16, 17, 17
•
17 18 18
•
19 19 21
•
…
•
1000, 1022, 1023
In the example above, the first line (Line 0) represents the output values for the case where R=0,
G=0, or B=0. In other words, if the R component of a pixel is set to 0, then set R component value to
16. Likewise, if G is set to 0, then set G to 17.
The second line
(Line 1) does a similar thing for input component values equal to 1.
A simple way to construct a LUT file is to use a Spreadsheet like Excel. Simply fill 3 columns and
1025 rows with LUT data, and save the result as a “CSV” file.
