HP DreamColor Z31x User Guide - Page 87

Optional calibration tags, Measurement averaging, Set linear segment, Select Klein cal file

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709.ICC. Refer to your operating system and/or application documentation for information on where to store these ICC profiles on your computer and activate them. Optional calibration tags The following optional tags can be added to the core calibration tags to provide additional capabilities. These optional tags must be placed before the element; they cannot be nested inside it. None of these tags are required to be in a StudioCal XML file. Measurement averaging This tag allows you to make and average multiple measurements. If you are using a colorimeter for calibration measurements, you may want to make multiple measurements of lower grayscale levels to compensate for the noise inherent in some colorimeters. NOTE: As spectroradiometers have less low-grayscale noise, this option is not typically used when measuring with those instruments. The tag contains two attributes and is structured as follows: N: The number of measurements to be taken and averaged. Integer values between 2 and 10 are supported. use_below_RGB: The RGB grayscale value below which you wish to make and average multiple measurements. A single 8-bit value between 1 and 255 is supported. Set linear segment This tag allows you to specify a grayscale value at which the gamma will switch from the calculated curve to a pure linear transition to zero. This is designed to allow you to mimic the measured performance of some projectors. The tag contains one attribute and is structured as follows: The value attribute supports 10-bit values between 1 and 1024. Select Klein cal file This tag is specific to the Klein K10 and K10-A and allows you to specify any cal file stored in the instrument as the matrix used for measurements. The default cal file for the Z31x is 15 and that is the one calibrated at Klein Instruments, but you may desire to generate your own matrix using ChromaSurf. This tag contains one attribute and is structured as follows: The value attribute supports integer values from 0-89. Contrast ratio limiting In some workflows-on-screen newsprint, for example-it is desirable to have a contrast ratio lower than the display's native contrast ratio. The display provides a tag for this workflow. The tag has one argument and is structured as follows: Optional calibration tags 77

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709.ICC. Refer to your operating system and/or application documentation for information on where to store
these ICC
profiles
on your computer and activate them.
Optional calibration tags
The following optional tags can be added to the core calibration tags to provide additional capabilities. These
optional tags must be placed before the <calibration> element; they cannot be nested inside it. None of these
tags are required to be in a StudioCal XML
file.
Measurement averaging
This tag allows you to make and average multiple measurements. If you are using a colorimeter for
calibration measurements, you may want to make multiple measurements of lower grayscale levels to
compensate for the noise inherent in some colorimeters.
NOTE:
As spectroradiometers have less low-grayscale noise, this option is not typically used when
measuring with those instruments.
The tag contains two attributes and is structured as follows:
<average_meas N="INTEGER" use_below_RGB="INTEGER"/>
N:
The number of measurements to be taken and averaged. Integer values between 2 and 10 are supported.
use_below_RGB:
The RGB grayscale value below which you wish to make and average multiple
measurements. A single 8-bit value between 1 and 255 is supported.
Set linear segment
This tag allows you to specify a grayscale value at which the gamma will switch from the calculated curve to a
pure linear transition to zero. This is designed to allow you to mimic the measured performance of some
projectors.
The tag contains one attribute and is structured as follows:
<set_linear_section value="INTEGER"/>
The value attribute supports 10-bit values between 1 and 1024.
Select Klein cal
file
This tag is
specific
to the Klein K10 and K10-A and allows you to specify any cal
file
stored in the instrument
as the matrix used for measurements. The default cal
file
for the Z31x is 15 and that is the one calibrated at
Klein Instruments, but you may desire to generate your own matrix using ChromaSurf.
This tag contains one attribute and is structured as follows:
<klein_cal value="INTEGER"/>
The value attribute supports integer values from 0–89.
Contrast ratio limiting
In some
workflows—on-screen
newsprint, for example—it is desirable to have a contrast ratio lower than the
display’s native contrast ratio. The display provides a tag for this
workflow.
The tag has one argument and is
structured as follows:
<cr_set cr="150"/>
Optional calibration tags
77