Canon DP-V3010 User Manual

COPY

User LUT Creation Guide

English

COPY

The User LUT function incorporated in a Canon video display (hereafter, “display”) imports the
one-dimensional Look-up Table (1D-LUT) and three-dimensional Look-up Table (3D-LUT) created by
the user to the display and adjust s t he look.

The User LUT function is used as follows.

① Create a LUT file (clut format file).
② Import the created LUT file to the display via a USB memory.

1. Concept Drawing of Display Image Processing and User LUT

About the LUT file (1D-LUT)

• The settings after [1D-LUT] are gamma = 2.2 and quantization range = Full Range. Therefore, the
1D-LUT file to be import ed to [1D-LUT] should be created in consideration of a gamma of 2.2.

• When linear data is set in the 1D-LUT file, the dis play characteristics are gamma = 2.2 and color
temperature and color ga mut values set by the OSD menu.

About the LUT file (3D-LUT)

• The settings after [3D-LUT] are gamma = 2.2, color temperature value set by the OSD menu, and
color gamut (base color g amut) set by the O SD menu w hen i mport ing th e 3D-LUT file to the display.
Therefore, the 3D-LUT file to be imported to [3D-LUT] should be created in consideration of these
settings.

2

COPY

• When linear data is set in the 3D-LUT file, the display characteristics are the gamma, color
temperature and base co l or gamut set by the OSD menu.

• Regardless of the [1D-LUT] settings, when setting the 3D-LUT file without performing color
temperature image processing, set the color temperature setting in the OSD menu to “DCI”. In this
case, the display charact eristics are ga mma = 2.2, color temperature = DCI, and color ga mut = base
color gamut.

About the base color gamut

• The base color gamut is the color gamut used as the reference when creating a 3D-LUT. The base
color gamut can be select ed from SMPTE-C, EBU, ITU-R BT.709, Adobe RGB, DCI or Native. This
is set by the OSD menu when import ing the 3D-LUT file to the display.

3

Item

Description

•

•

When the LUT type is gamut: Designate one of 9, 17, 33 or 65.

⇒

interval*

display.

COPY

2. LUT File Configur ation

 LUT file name

The LUT file name is assigned as fo llows.

• Available character types: Half-width alphanumeric characters only

• Number of characters that can be used: 32 char acters max. (including file extension)

• File extension: “.clut”

 LUT file format

The detailed LUT file format is show n below.

LUT type type Designate gamma (1D-LUT) or gamut (3D-LUT).

• gamma: For gamma table
gamut: For color gamut

Number of lattice
points

Number of bits* bit 32F (32-bit floating decimal point, range: 0 to 1). Fixed value.

Lattice point array
format*

Lattice point

Actual LUT data values • When the LUT type is gamma

size • When the LUT t ype is gamma: Designat e one of 128, 256, 512 or

1024.

Note: Handling of data out side t his range results in an error.

order Only when the LUT type is gamut. Designate top or bottom. The

default when not designated is top.

• When top is designated, add LUT data i n t he following order.

Start: (0, 0, 0), (1, 0, 0), (2, 0, 0) … …, ( last, 0, 0)

⇒ (0, 1, 0), (1, 1, 0), (2, 1, 0) ……, (last, 1, 0)
⇒ (0, 2, 0), (1, 2, 0), (2, 2, 0) ……, (last, 2, 0)

• When bottom is designated, add LUT data in the following order.

Start: (0, 0, 0), (0, 0, 1), (0, 0, 2) ……, (0, 0, last)

⇒ (0, 1, 0), (0, 1, 1), (0, 1, 2) ……, (0, 1, last )

(0, 2, 0), (0, 2, 1), (0, 2, 2) ……, (0, 2, last )

interval Equal (even interval). Fixed value.

Method of noting one line: G am m a value (line break)

• When the LUT type is gamut

Method of noting one line: Red (tag) Green (tag) Blue (line break)

Note: The limit number of characters for 32F is 10 characters or

less (integer portion + decimal point + decimal portion).
(Example) 0.12345678

Comment* # Use this to note the file name, date and time of creation, and other

information.

LUT name* name The available charact er s ar e ASCII hexadecimal characters.

Note: This is displayed as a selection item in the OSD menu of th e

4

COPY

Note: Items indicated by an ast er isk (*) can be omitted. When an item is omitted, t he corresponding tag
name is also deleted.

MEMO

• Use one of CR (carriage return), LF (line feed) or CR+LF as the line brea k code.

• Use one of Shift-JIS, EUC-JP or UTF-8 (with/without BOM) as the character code.

• Gamma (1D-LUT) and gamut (3D-LUT) can be described in the same file.

• When there are multiple gamma (1D-LUT) and gamut (3D-LUT), the ones nearest to the start of

the file have priority.

5

 Examples of LUT files

LUT name*

LUT name*

COPY

1D-LUT file

3D-LUT file

Note: Items indicated by asterisks (*) can be omitted.

Comment*

LUT type
Number of lattice points
Number of bits*
Lattice point interval*

Actual LUT data

Comment*

LUT type
Number of lattice points
Number of bits*
Lattice point interval*

Actual LUT data

6

COPY

3. Examples of Crea ting LUT Files

 1D-LUT: When using a Viewing LUT* for Canon Log gamma

conversion

The method of creating a LUT file (1D-LUT) using a Viewing LUT for conversion fro m Canon Log
gamma to WideDR gamma is described below.

* This exa mple describes the case when using “LUT (lookup table) f or Canon Log Gamma,
Canon Log 10 to WideDR 10 LUT Version 1.1”.

① Download the Viewing LUT to the PC to be used.

• Download the Viewing LUT provided by CINEMA EOS noted above from the Canon website.

② Convert the dynamic ra nge of the Viewing LUT.

• The Viewing LUT is a 10-bit input 10-bit output 1D-LUT.

• The Viewing LUT has a black level of 4 and a white level of 1019, so per form range conversion

to adjust to the dynamic range of the display. Next, normalize t o 1023 to match the LUT file
(1D-LUT) format.
Labeling the n-gradation lat tice point data of the Viewing LUT as Lut (n), the n-gradation lattice
point data (LUT fi le (1DLUT)_n) after range conversion and n ormalization is obtained by the
following calculation. (n: 0 to 1023)

LUT file (1DLUT)_n = ( ( Lut (n) - 4 ) × 1023 ÷ (1019 - 4 ) ) ÷ 1023

All the lattice point (gradat ion 0 to 1023) data of the Viewing LUT is calculated based on the
above formula.
The number of bits is 32 bits (fixed value).

③ Change the format.

• Refer to “2. LUT File Configuration”.

④ Save the created LUT file to the USB memory.

• USB memory format: FAT32 or FAT16

• LUT file copy destination folder: USB memory root folder

Setting the display and importing the LUT file

Also refer to the Instructio n ma nual of the display.

① Connect the USB memory on which the LUT file is saved to the USB terminal of the display.

② Select one of “User 1” to “User 7” from Pi ct ure Mode in the OSD menu.

• Set the color temperature and color gamut to arbitr ary values.

③ Select “Adjustment” →“LUT Import” in the OSD menu.

• LUT Type: Select “Gamma”.

• File Name: Select the corresponding LUT file na m e.

④ Select “E

• LUT file import starts.

• When import is co mp lete, the message “Import is completed. ” is displ ayed on the screen.

xecute”.

7

・・・ ・・・ ・・・

COPY

 3D-LUT: When using a DaVinci Resolve or Pablo 3D-LUT

The method of applying a 3D-LUT, exported by Blackmagic Design’s DaVinci Resolve or Quantel’s
Pablo, to a display is described below.
The example below shows the case when converting DCI color space to ITU-R BT.709 color space.

• DCI (input color space): Color gamut = DCI, co lor temperature = DCI, gamma = 2.6

• ITU-R BT.709 (output color space): Color gamut = ITU-R BT. 70 9, color temperature = D65,

gamma = 2.2

① Export the DaVinci Resolve or Pablo 3D-LUT.

• Refer to the DaVinci Resolve or Pablo Instruction manual for the export method.

② Change the file extension of the output fi le to “.clut”. (Example: ***.cube / ***.txt → ***.clut)

③ Comment out all locations other than the actual LUT data in the output file.

• Add “#” to the start.
(Example) When using DaVinci Resolve

#TITLE "Generate by Res olv e"
#LUT_3D_SIZE 17

0.00000000 0.00000000 0.00000000

0.12876712 0.03652968 0.01917808

(Example) When using Pablo

#max value 1023
#vertices 17
#blue is fastest changing
#red is slowest changing

#cube data
# R G B
0 0 0

0 0 256
・・・ ・・・ ・・・

Comment out

Comment out

8

Setting the display and importing the LUT file

COPY

④ Add a description to the output file.

• Refer to “2. LUT File Configuration” for the format.
(Example) When using DaVinci Resolve or Pablo with a number of lattice points of “17”

⑤ Convert the actual LUT data to match the format.

type gamut
size 17
order bottom
values

• When the actual LUT data format differs, nor malize t o 32F (32-bit floating dec imal point , range: 0
to 1). See “2. LUT File Configuration” for the format.
(Example) When using DaVinci Resolve

When the LUT range is 0 to 1.0, use the data as is.

Note: When the LUT range differs, perform range conver sion.

(Example) When using Pablo

Conversion to 32F is required. When the LUT range is 0 to 1023 and the actual Pablo
data is Pablo_3DLUT (l,m,n), the 3DLUT(l,m,n) gradation lattice point data (LUT
file(3DLUT)_lmn) of the display is obtained by t he fo llowing calculation. (l,m,n: 0 to 16)

LUT file(3DL UT) _lmn=Pablo_3DLUT (l,m,n)÷1023

All the lattice point data of t he LUT is calculated based on t he above formula.

Note: If the LUT range differs, perfor m range conversion.

⑥ Save the created LUT file to the USB memory.

• USB memory format: FAT32 or FAT16

• LUT file copy destination folder: USB memory root folder

Also refer to the Instructio n ma nual of the display.

① Connect the USB memory on which the LUT file is saved to the USB termi nal of t he display.

② Select one of “User 1” to “User 7” from Pi ct ure Mode in the OSD menu.

• Set gamma = 2.2 and color temperature = D65.

• W hen setting the LUT without performing color temperature image processing, always set the

color temperature to DCI. In this case, create the DaVinci Resolve or Pablo 3D-LUT again in
consideration of color te m per at ur e = DCI.

③ Select “Adjustment” → “LUT Import” in the OSD menu.

• LUT Type: Select “Color Gamut”.

• File Name: Select the corresponding LUT file nam e.

• Base Color Gamut: Select “ITU-R BT.709”.

④ Select “Execute”.

• LUT f

• When import is complete, the message “Import is completed.” is displayed on the screen.

ile import starts.

9

Display item

Description

File Name

Selects the LUT file (.clut) name.

Base Color Gamut

Selects the base color gamut when creating a 3D-LUT.

Message

Description

imported.

COPY

 Display OSD menu “LUT Import” screen

LUT Type Selects the type of LUT to be imported. Select “Gamma” to import a 1D-LUT,

or “Color Gamut” to import a 3D-LUT.

Execute Executes LUT file import.

 Error messages displayed on the display

“LUT T ype” is different. Displayed when a LUT file with a different LUT type is

imported.

Failed to read file. • Displayed when there is an error in the USB memory or

when the USB memory is writ e-protected.

• Displayed when the LUT fi le is em pty (0 bytes) or when
the LUT file could not be imported properly because the
USB memory was disconnected while importing the LUT
file, etc.

Failed to import. Displayed when there is some abnormality in the file to be

• DaVinci Resolve is trademark of Blackmagic De sign Pty. Ltd.

• Pablo is trademark of Quantel Ltd.

• Other products may be trademarks of their res pective companies.

• The contents noted in this manual are current as of December 2013.

MIE-0003-000 © CANON INC. 2013

10