Chroma/Phase adjustment

TRIMASTER EL
MONITORS CALIBRATION
DANIEL DUBREUIL
March 2014
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Professional Monitors
Monitor calibration
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Professional Monitors
61
Colour calibration procedure
1. Colour temperature manual and automatic adjustment (colour temperature)
•
To adjust the white point to the desired colour temperature all through the luminance
level
2. Chroma/Phase manual adjustment (colour saturation and hue)
•
To adjust the colour saturation and hue at the correct level.
•
Phase adjustment is effective in analogue NTSC only
3. Brightness manual adjustment (luminance black level)
•
To adjust the darkest black level at 0 IRE using the PLUGE signal
4. Contrast manual adjustment (luminance white level)
•
3
To adjust the luminance point at the desired value when displaying 100 IRE (100%
white) signal
Professional Monitors
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Monitor Warm-up Time
To perform stable color reproduction, the monitor must be warmed up
sufficiently. At least 30 minutes warm-up…
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Professional Monitors
1. COLOUR TEMPERATURE ADJUSTMENT
Manual and automatic white balance adjustment
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Professional Monitors
Sony “Monitor_AutoWhiteAdjustment” software V1.1.2.0
10 Applicable Probes
- i1 Pro, i1 Pro 2
- CA-210, CA-310, CS-200
- PM5639/06
- PR-655, PR-670
- K-10
- Specbos1211
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Professional Monitors
(X-Rite)
(Konica Minolta)
(DK-Technologies)
(Photo Research)
(Klein)
(JETI)
GUI lay-out operation - How to use this software?
For details, please refer to the Operating Instructions included in the application installer.
Preparation 1.
Click to open the list of
network adapter, check
and if necessary select
the one that belongs to
the network in which the
target monitor is
connected.
Preparation 2.
Select “Peer to Peer” or “LAN”
depending on the installation.
Preparation 3.
In case of LAN connection,
select the target monitor.
It can be selected from
among the connected
monitor list, or by directly
typing in the monitor IP
address.
Preparation 4.
Select the type of probe you are using. Note that the driver for that
probe must already be installed in the computer. Connect probe to PC,
and calibrate the probe by clicking the button. After the probe
calibration, user is now ready to measure any monitor.
Professional Monitors
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Measuring the monitor colour
temperature manually
After the probe calibration, set probe
on the monitor screen*1 and click the
button to start measuring. x, y data
is indicated in real time. To stop
measuring, click the button again.
The measured value can be also set
as a target value for monitor
adjustment.
*1 Any monitor can be measured.
Manual adjustment
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The CIE 1931 standard for colour temperature adjustment
The CIE colour space chart
International Commission on Illumination
ITU-709 x,y coordinates for
D65 (6504K) white:
• x = 0.3127
• y = 0.3290
Adjust RGB Gain & Bias
• Gain @100% white
• Bias @ 20% white (grey)
• Set RGB gain (white) and bias (grey)
adjustment to match desired colour
temperature i.e. D55, D61, D65, D93,
D-Cine, USER
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Professional Monitors
CIE xyY
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The CIE 1931 standard for colour temperature adjustment
The CIE colour space chart
International Commission on Illumination
ITU-709 x,y coordinates for
D65 (6504K) white: for OLED
• x = 0.3067 offset: x-0.006
• y = 0.3180 offset: y-0.011
Adjust RGB Gain & Bias
• Gain @100% white
• Bias @ 20% white (grey)
• Set RGB gain (white) and bias (grey)
adjustment to match desired colour
temperature i.e. D55, D61, D65, D93,
D-Cine, USER
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Professional Monitors
CIE xyY
PVM-A Series colour temperature manual adjustment Gain/Bias
1. Select colour
temperature
memory to
User1 or 2
2. Adjust
Gain/Bias
manually
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Professional Monitors
PVM-A Series colour temperature manual adjustment Gain/Bias
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Professional Monitors
GUI lay-out operation - How to use this software?
For details, please refer to the Operating Instructions included in the application installer.
Preparation 1.
Click to open the list of
network adapter, check
and if necessary select
the one that belongs to
the network in which the
target monitor is
connected.
Preparation 2.
Select “Peer to Peer” or “LAN”
depending on the installation.
Preparation 3.
In case of LAN connection,
select the target monitor.
It can be selected from
among the connected
monitor list, or by directly
typing in the monitor IP
address.
Preparation 4.
Select the type of probe you are using. Note that the driver for that
probe must already be installed in the computer.Connect probe to PC,
and calibrate the probe by clicking the button. After the probe
calibration, user is now ready to measure any monitor.
Professional Monitors
12
Measuring the monitor colour
temperature manually
After the probe calibration, set probe
on the monitor screen*1 and click the
button to start measuring. x, y data
is indicated in real time. To stop
measuring, click the button again.
The measured value can be also set
as a target value for monitor
adjustment.
*1 Any monitor can be measured.
Adjusting the monitor colour
temperature automatically
After all the preparation, user can
adjust the monitor. Target values
can be set by either clicking the
preset value buttons (D65 or D93),
clicking the “Measured Data”
button*, or by directly typing in the
values.
Set probe on the monitor screen
and click the “Adjust” button to start
adjustment*2.
* The target can be set to the value that
was measured using the measuring
function of this software. (e.g. User can
adjust the monitor to the same value as
that of a reference monitor).
*2 The monitor will use its internal test signals to make the adjustment.
Auto Offset data for OLED
x,y offset data* are necessary to compensate for the visible colour differences
existing between various display technologies (i.e. OLED vs.CRT).
Automatic
adjustment of
colour and
luminance
x, y, Y
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Professional Monitors
* Please refer to the OLED Colour Matching white paper issued by Sony.
System configuration for AWB (wiring)
Auto White Balance
For a quick and easy monitor
white balance and luminance
(contrast) adjustment.
Connection
• Wireless LAN
• Wired LAN
• Peer-to-peer
Application installed
Windows PC
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Professional Monitors
i1Pro probe
(X-Rite, Inc.)
“Monitor_AutoWhiteAdjustment”
Adjustment
completed
within 1 min.
per unit
Applicable models
1/ BVM series
3/ LMD series
- BVM-E250/E170 (V1.1 or later)
- BVM-E250A/E170A
- BVM-F250/F170 (V1.1 or later)
- BVM-F250A/F170A
- LMD-A240/A220/A170 (V1.1* or later)
- LMD-4251TD
- LMD-2451TD
- LMD-2451W (Serial no: 3000998 or later)
- LMD-2451W (Serial no.: 5000164 or later)
- LMD-2051W
- LMD-1751W
- LMD-2341W
- LMD-2041W
- LMD-1541W
- LMD-940W (Serial no: 3004727 or later)
- LMD-941W
2/ PVM series
- PVM-A250/A170 (V1.1* or later)
- PVM-2541/2541A
- PVM-1741/1741A
- PVM-740/741
* Availability July2014
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TRIMASTER EL
Where to find this software?
Download from Sony website:
www.pro.sony.eu/monitors
Available at Product page <Support> section.
Click here!
A user guide is provided with this software.
Software is free of charge!
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Professional Monitors
Type
2. CHROMA/PHASE ADJUSTMENT
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Professional Monitors
SMPTE ECR 1-1978
SMPTE colour bars test signals
SMPTE colour bars for SD
Used for adjusting Chroma, Phase, Brightness and Contrast
75% contrast colour bars
For Chroma/phase adjustment
100% WHITE
PLUGE
75% contrast colour bars
For Chroma/phase adjustment
100% WHITE
Society of Motion Picture and Television Engineers
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100% White
Professional Monitors For contrast adjustment
PLUGE Picture line-up generation equipment
For brightness adjustment
PLUGE
SMPTE RP 219-2002
SMPTE colour bars test signals
SMPTE colour bars for HD
Used for adjusting Chroma, Phase, Brightness and Contrast
75% contrast colour bars
For Chroma/phase adjustment
100% WHITE
PLUGE
75% contrast colour bars
For Chroma/phase adjustment
100% WHITE
PLUGE
Society of Motion Picture and Television Engineers
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100% White
Professional Monitors For contrast adjustment
PLUGE Picture line-up generation equipment
For brightness adjustment
Chroma/Phase adjustment
1. Input the SMPTE colour bars signal to the monitor.
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Professional Monitors
Chroma/Phase adjustment
2. Set the monitor to the “Blue Only” mode.
•
•
•
•
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Blue Only” mode displays the
blue signal component only as
a black-and-white signal.
In order to make the
adjustment of the decoder
easier, the blue signal is
amplified.
The blue signal is routed to all
three colour channels.
This provides the operator with
a black and white display that
is brighter and easier to see.
Professional Monitors
Chroma/Phase adjustment
3. Adjust the CHROMA control so that the brightness of bars
(1) and (4) are the same.
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Professional Monitors
Chroma/Phase adjustment
4. Adjust the PHASE control so that the brightness of bars
(2) and (3) are the same.
•
Phase adj. cannot be performed for
PAL signals and component signals.
Cyan in bar (2) -> Mix of Green & Blue
Magenta in bar (3) -> Mix of Red & Blue
• Share same amount of blue
component
•
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Adjust the PHASE control until the
upper and lower parts of bars (2) and
(3) have the same brightness.
Professional Monitors
Chroma/Phase adjustment
5. As the CHROMA and PHASE
adjustments affect each other, repeat
steps 3 and 4 until the brightness of all
(1), (2), (3) and (4) of the colour bar are
the same.
6. Release the “Blue Only” mode.
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Professional Monitors
3. BRIGHTNESS MANUAL ADJUSTMENT
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Professional Monitors
63
Brightness/Contrast manual adjustment
• An image on a colour video monitor is seen differently according to the ambient
light (environmental brightness)
-> It is necessary to adjust Brightness and Contrast under the ambient lighting conditions especially
to set the black level correctly.
Contrast
Brightness
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Professional Monitors
-> White luminance level adj.
-> Black luminance level adj.
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Brightness adjustment using a PLUGE test pattern
Brightness adjustment
• Adjust the brightness by using an external PLUGE test pattern.
Adjust the –4%, 0% and +4% (super-black, normal black, and near-black) ranges
of the PLUGE test pattern
• The monitor is now set up to display a 0-IRE signal as the darkest black.
Note: Low Average Picture Level (APL)
provides better adjustment accuracy.
Adjust so that the –4% and 0% ranges
are seen as equal and the +4% and 0%
ranges are more distinctive.
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Professional Monitors
* As the brightness and contrast adjustments affect each other, repeat both adjustments a couple of times.
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Brightness adjustment using SMPTE test pattern
Brightness adjustment
• by using an external SMPTE HD colour bars signal (RP 219-2002).
Adjust the –2%, 0% and +2% (super-black, normal black, and near-black)
ranges or the 0%, +2% and +4% ranges of the PLUGE signal section of the
colour bars with the BRIGHT knob.
• The monitor is now set up to display a 0-IRE signal as the darkest black.
• HD signal:
Adjust so that the –2% and 0% ranges
are seen as equal and the +2% and 0%
ranges are more distinctive.
• SD signal:
Adjust so that the 0% and +2% ranges
are seen as equal and the +2% and +4%
ranges are more distinctive.
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Professional Monitors
* As the brightness and contrast adjustments affect each other, repeat both adjustments a couple of times.
4. CONTRAST MANUAL ADJUSTMENT
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Professional Monitors
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Contrast adjustment using white test pattern
Contrast adjustment (with colour analyser)
• Use 100% white field (100-IRE) signal and an external colour analyser to adjust the
luminance level to the desired value
(i.e. 100cd/m2 at 100% White signal)
i1 Pro2
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Professional Monitors
* As the brightness and contrast adjustments affect each other, repeat both adjustments a couple of times.
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Contrast adjustment using SMPTE test pattern
Contrast adjustment (with colour analyser)
• Use HD SMPTE colour bars 100% white area and measure with an external colour probe
analyser to adjust the luminance level to the desired value
(i.e. 100cd/m2 for 100% White signal)
i1 Pro2
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Professional Monitors
* As the brightness and contrast adjustments affect each other, repeat both adjustments a couple of times.
THANK YOU.
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Professional Monitors

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