a Radiance Pro to get our advanced auto-calibration package
for only $280. A savings of over $500! Includes ChromaPure Standard,
Advanced Auto-Calibrate, and a
Display 3 PRO meter
(latest Rev.B version).
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What is automatic calibration?
Automatic calibration allows anyone with little or no training to fully
calibrate their display with almost no user input.
It adjusts the display's grayscale, gamma, and colours to levels of accuracy that
are simply not achievable by manual methods.
Just setup a few simple options in ChromaPure
software, click "Auto-Calibrate", and then go have a cup of coffee while the
process completes, usually in a few minutes.
There is no need for the user to understand how calibration works.
Suitable for all display types.
Why use automatic calibration?
Previously, calibration required the user to adjust their display manually while
ChromaPure software read the results using a meter. The
user would loop through displaying test patterns, reading the results, and
making adjustments, until the results were as close to accurate as
possible. These calibration steps are outlined in our
free step by step
Manual calibration has many drawbacks:
- Requires the user to have access to typically hidden (service menu) controls in the display.
- Displays often have limited adjustments that do not work
correctly, or are cryptic.
- Displays often have only 1 gamma adjustment, if any at all (compared to
up to 21 points with
- Displays often only have only 2 greyscale adjustments, if any at all (compared to
up to 21 points
- Manual calibration of colour (gamut) is typically only done at 6 points,
if the adjustments are even available
(compared to up to 4913 points with auto-cal).
- Time consuming. Manual calibration requires the user to interpret the
meter readings and make the necessary changes in the display. Our
free step by
step guide is a step in the right direction, but the process is
still manually driven and can take hours, especially for someone new to the process.
All of these can result in a less than perfect calibration. Only automatic
calibration, done outside of the display, can compensate for these issues.
How does automatic calibration work?
Automatic calibration is an optional add-on to
ChromaPure software, and it works in
conjunction with a DVDO Duo or
Lumagen Radiance external video processor. The
processor acts as both a test pattern signal generator and calibration device
that contains the adjustments to keep the signal calibrated.
ChromaPure tells the video processor to display test patterns, measures the
results with a meter, and then tells the video processor how to adjust the
signal to compensate for display errors. This cycle repeats (often for thousands
of test points) until the measured results are as close to perfect as possible.
The lookup table of calibration offsets for each point is stored in the video
Once completed, the video processor stays in the signal chain permanently,
constantly adjusting the signal in real time against the lookup table to keep the display perfectly
ChromaPure even generates a before and after
calibration report for you.
Why does the number of calibration points matter?
With the more advanced packages that use the Radiance
video processor, calibration of up to 4913 colour points can be done achieving unparalleled colour
Instead of colour calibrating to only the 6 primary/secondary colours that make up
the boundary of all known colours (called the gamut), we can calibrate throughout the
entire colour space by measuring and correcting up to 4913 colours. Only
calibrating at the boundaries (as is done with manual calibration) can still
leave many inaccuracies (see
real life example).
level of calibration accuracy has only been made possible by recent advancements in
processing power found in the
family of video processors. (The DVDO Duo does not have the processing power for
more than 6 points).
Manual calibration at thousands of points is simply not possible because
displays do not have look up tables (LUTs) in which to store the correction
information. Even if they did, manually calibrating to thousands of points would
quite literally take the user weeks to perform.
The maximum number of colour calibration points
depends on the model of video processor you have:
- 4913 points: Radiance 21xx, 41xx/44xx, Pro series
- 729 points: Radiance 20xx series
- 125 points: Radiance Mini, XD, XE, XS
- 6 points: DVDO Duo
To use any of the calibration
packages you also require a PC or laptop running Microsoft Windows XP, Vista, or
Windows 7/8/10 or higher.
ChromaPure also run fine on a Mac using Windows emulators such as
Parallels Desktop or
a split partition using
Auto-Cal package comparison
*Supports 2160p60 (4K resolution) input and output
Why buy from CurtPalme.com?
CurtPalme.com are calibration experts and authors of popular free calibration
guides. We live and breathe calibration. No matter what
your needs we can assist in choosing what's right for you. We offer products for
the budget DIY'er all the way up to the seasoned professional, all at CurtPalme.com
Grayscale & Color Calibration for Dummies
Official ChromaPure calibration software forum thread
ChromaPure Discussion/Support Forum
FAQ: Which meter
is right for me?
Some informative Colour Science articles can be found here - an
interesting read for advanced users:
Science: About Meter Accuracy
Video Calibration Myths
Science: Display Calculators
Lightness and Luminance
Calibrating Front Projectors
The Three Dimensions of Color
All about Color Decoding
Questions, comments or feedback should be directed to