Gamma Transfer 1D LUT (1D Look-Up Table), Version 2.0 for the EOS-1D C, EOS 5D Mark IV, and EOS R
| Article ID: ART174807 |
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Date published: 06/21/2019 |
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Date last updated: 06/21/2019 |
Description
This is the summation of the ReadMe file for the 1D LUT that is included with the downloadable LUT files for the EOS-1D C, EOS 5D Mark IV, and EOS R.
Solution
Gamma Transfer 1D LUT (1D Look-Up Table), Version 2.0
- LUT Category
Viewing LUT
- LUT Overview
A 1D LUT that converts from Canon Log gamma
- File Format
.cube format
- Applicable Models
Different 1D LUTs are used because different products have different gamma settings.
Check the correspondence below table before use.
EOS-1D C, EOS 5D Mark IV, EOS R
- Correspondence Table
| Input |
Output |
| Gamma |
Range |
Bits |
Gamma |
Range |
| Canon Log |
Full |
10/12/16 |
BT.709
(Gamma 2.2) |
Full,
Narrow |
| Canon Log |
Full |
10/12/16 |
Wide DR |
Full,
Narrow |
- File naming conventions
[Gamma]_[BitNum]-to-[Gamma]_[Range] [Range]_[Version].cube
(2) (2) (3) (4) (5) (6)
Example: CanonLog_10-to-BT709_FF_Ver.2.0.cube
7. Input gamma
8. Input bit depth
9. Output gamma
10. Input range (N: Narrow, F: Full)
11. Output range (N: Narrow, F: Full, L: Linear)
12. Version
- Explanation of the data format
Example: Canon Log 2 to Cineon 10-bit version
| Lines beginning with the pound sign (#) |
Comments about the 1D LUT file |
| LUT_1D_SIZE 1024 |
Size of the 1D LUT |
| 0.000000 |
0.000000 |
0.000000 |
| 0.000510 |
0.000510 |
0.000510 |
| 0.001728 |
0.001728 |
0.001728 |
| 0.002946 |
0.002946 |
0.002946 |
- Explanation of Linear LUTs
| -0.016363 |
-0.016363 |
-0.016363 |
| -0.016298 |
-0.016298 |
-0.016298 |
| -0.016234 |
-0.016234 |
-0.016234 |
| -0.016169 |
-0.016169 |
-0.016169 |
|
Indicates the data are Scene Linear values
Example: 0.200000 = 20% (18% Grey)
1.000000 = 100% (90% White)
|
- LUTs for conversions to Wide DR
The Narrow range version of Wide DR is a curve that was used into the super-whites
(outputs over 100%), whereas with the Full range version of Wide DR, this curve is
compressed in a format to fit within 100% output.
- Reference: Gamma data values at different brightness
| Gamma |
Range |
Scene Linear % (Reflection %) |
0%
(0% Black) |
20%
(18% Grey) |
100%
(90% White) |
800% |
1600% |
6400% |
| Canon Log |
Full |
0.1251 |
0.3434 |
0.5998 |
0.9929 |
--- |
--- |
| Wide DR |
Full |
0.0000 |
0.3963 |
0.7294 |
0.9927 |
--- |
--- |
| Narrow |
0.0625 |
0.4340 |
0.7463 |
0.9931 |
--- |
--- |
BT.709
(Gamma 2.2) |
Full |
0.0000 |
0.4337 |
1.0000 |
--- |
--- |
--- |
| Narrow |
0.0625 |
0.4336 |
0.9182 |
--- |
--- |
--- |
