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A-14
CLIPSTER Edit Tool User Guide
A.5 3D LUT Files
Three-dimensional look-up table (3D LUT) files are used for color cor-
rections and/or color space conversions by defining output color values
for input values. They are available in various formats, either encrypted
(e.g. *.e3d) or unencrypted (e.g. *.3dl or *.xml). This section de-
scribes the unencrypted 3D LUT files.
A.5.1 General Description
A 3D LUT file lists triplets of values for a color transformation. Depend-
ing on the color depth of the 3D LUT, each triplet of values (R’G’B’)
specifies the output values for a certain RGB node, i.e. the resulting
mapped values of input values. The RGB nodes (input values) are not
explicitly listed in a 3D LUT file. In a *.3dl file they are available in the
first uncommented line of the file and determine bit depth and number
of nodes for the 3D LUT. In an *.xml file these information are set as
attributes of the 3D LUT tag.
The DVS hardware can handle 17 nodes in a 3D LUT with an accuracy
of 12 bit, meaning 17 nodes for R times 17 nodes for G times 17 nodes
for B (17 × 17 × 17 = 17
3
= 4913 R’G’B’ values).
The nodes determine the RGB input values:
Nodes as, for example, listed in a *.3dl file (17 nodes, 10 bit):
0 64 128 192 256 320 384 448 512 576 640 704 768 832 896 960 1023
Resulting in the following RGB nodes:
# of
node R G B
1000
20064
300128
...
17 0 0 1023
18 0 64 0
19 0 64 64
20 0 64 128
...
34 0 64 1023
35 0 128 0
36 0 128 64
...
289 0 1023 1023
290 64 0 0
291 64 0 64
...
4911 1023 1023 896
4912 1023 1023 960
4913 1023 1023 1023
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