HP DreamColor Z31x Studio Display User Manual download pdf (Page 92)

name: The name of the preset being created. Names can be up to 15 characters in length and may consist of

alphanumeric (A–Za–z0–9) characters, a period (.), and a space. All other ASCII characters are converted to

periods.

folder: The name of the folder on the USB ash drive where the LUT les are stored.

store: The memory store that will be used and accepts the values “user” or “factory”. The display contains

two dierent memory stores: factory and user.

● The factory store is a protected memory location where the factory calibration is stored. When a

calibration is written to the factory memory location, the user memory location is also rewritten to

match the factory memory location. This location can only be rewritten using StudioCal.XML. This option

is provided to allow you to store a calibration that can easily be recalled using the “Reset to Factory

Calibration” or “Factory Reset” command.

● The user store is the memory location where all menu-driven calibrations are stored. This memory

location is not protected and is rewritten when any type of calibration is performed or if a “Factory

Calibration” or “Factory Reset” command is issued.

Upload LUT example

The following is an example of a StudioCal XML le that uploads the LUTs for preset 6.

<?xml version="1.0" encoding="ISO-8859-1"?>

<upload_lut entries="1">

<lut_details num="0" name = "GS DCI D65" folder="0-GS DCI D65"

store="factory"/>

</upload_lut>

</studiocal>

LUT folder structure

A LUT folder must contain three text les. Each le has a name that identies preset name, preset number,

and type of information stored within the le, or “name-num-type.” For example, if the preset name is “BT.

709” and the preset number was “2”, then each LUT le name has the prex “BT.709-2.” The following les

are required in a LUT folder:

Name-num-3D.cube: An ASCII text le which conforms to the .cube format. The 3D LUT used by the display is

a 17×17×17 cube with 12-bit integer values for each vertex. Documentation for the .cube format is

maintained by Adobe and can be found online.

name-num-PostLUT.txt: An ASCII text le which conforms to the 1D ASCII format. The PostLUT used by the

display has 1024 entries, with 14-bit integer values for each entry.

The rst line of the LUT le is the declaration and indicates the number of LUTs in the le (usually 3, one each

for red, green, and blue), the number of entries in each lut, and the bit precision of the LUT values. For

example, LUTs downloaded from the display have the following declaration:

LUT: 3 1024 14-bit

Optional comments may be used to store the color space preset the LUT was generated for, the type of LUT

(PreLUT or PostLUT) and the beginning of each channel LUT. The display automatically generates all of these

comments to make the LUT le more human-readable. The following is an example of a LUT le:

# BT.709 #

82 Chapter 4 Using the StudioCal XML schema

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HP DreamColor Z31x Studio Display User Manual Page 92