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File Formats - LookUp Table
Description
The lookup table stores Red/Green/Blue (RGB) color information. It
can store 256 values (0 through 255) as a sequence of 8-bit numbers.
If you think of the lookup table as a 256x3 matrix, the numbers are stored
in column-major order. This means that 256 R-values are followed
by 256 G-values, followed by 256 B-values, for a total of 768 bytes exactly.
The numbers can be either in a single column or in three lines of 256
values (fields) each.
Binary format option The numbers must be binary and the file name
must have a .lut extension.
Ascii format option The numbers must be in ascii format and the
file name must have a .lua extension.
The lookup table file must be located in the
LUT subdirectory in the directory containing the EMSE Suite executable
files. Filenames
must be unique. If
a binary (*.lut) and an ascii (*.lua) have the same primary filename,
only the binary file will be recognized and included in the color lookup
table pull-down menu.
An example ascii format lookup table (GrayNull.lua)
can be found in the LUT directory.
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