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VPixx X-Rite i1Display Pro Colorimeter

Specifications
Data Sheet
User Manual

Note

The calibration information is now included as part of the ...
Application Guide for VPixx Products
... and the relevant section has been printed and is kept with the i1Display Pro device in its storage box in the MEG Side Room.

Info

"The i1Display Pro colorimeter features an advanced, high-end optical system with custom-designed filters. It provides a near-perfect match to the color perception of the human visual system, delivering superior color measurement results.
i1Display Pro supports all modern display technologies, including LED backlight and wide gamut displays. It is spectrally calibrated, making it fully field upgradeable to support future display technologies. - VPixx Technologies

The Colorimeter can be used as a Standalone device or through MATLAB.

Standalone

(e.g. usage on own laptop to investigate stimuli generated via Stim PC).

  • Install VPixx Software Tools from the provided USB stick (already done for CHBH-ST-MEG-W02).
  • Plug in the Colorimeter to an availabe USB port, attach it to the back projection screen where required (wider Micropore tape is available).
  • Start the VPutil application by clicking on its Desktop shortcut. The VPutil menu will appear.
  • Type “3” to initiate the Calibration commands.
  • Type "i1d", and follow the instructions to take a measurement.
  • Type "q" to quit.

Through MATLAB

(below instructions already done for CHBH-ST-MEG-W02).

  • Copy I1.mexw64 (15/06/2021 94KB, from the USB memory stick) to C:\toolbox\Psychtoolbox\PsychBasic\MatlabWindowsFilesR2007a.
  • Copy the new Datapixx.mexw64 (from C:\Program Files\VPixx Technologies\Software Tools\DatapixxToolbox_trunk\mexdev\build\matlab\win64) to the following usage locations depending on which version of MATLAB used ...
    • C:\toolbox\DataPixx - for MATLAB R2017A.
    • C:\toolbox\Psychtoolbox\PsychBasic\MatlabWindowsFilesR2007a - for MATLAB R2019B.

Previous versions of Datapixx MEX files have been renamed to "Old_Datapixx..." etc

Starting MATLAB and typing "I1", Enter, lists the I1's functions... not all are usable as we have the i1Display Pro, not the i1Pro.

>> I1

Usage:

% All I1 (Pro, Pro3, Display) functions:
isConnected = I1('IsConnected');
I1('Calibrate');
Lxy = I1('GetTriStimulus');

% I1Pro / I1Pro3 functions:
I1('TriggerMeasurement');
keyPressed = I1('KeyPressed');
spectrum = I1('GetSpectrum');

% I1 Display ONLY functions:
I1('SetIntegrationTime', time);
time = I1('GetIntegrationTime');
I1('SetMeasurementMode', 'mode');
mode = I1('GetMeasurementMode');
SERVER MODE VERSION: 3.9 [05/APR/2021]

>> I1('IsConnected?');

Usage:

isConnected = I1('IsConnected', [device]);

Returns non-0 if an X-Rite I1 has been detected.
The argument 'device' can be used to choose a device should 2 different i1ProDev
be connected to the computer.
It should be noted that only 1 device can be used at the same time.
Device is one of the following value:
    - i1Pro
    - i1Pro3
    - i1Display

Note

>> isConnected = I1('IsConnected'); produces the result for ‘isConnected’ as "1" if the "I1" is connected, "0" otherwise.


>> I1('SetMeasurementMode?');

Usage:

I1('SetMeasurementMode', ‘mode’);

Sets the calibration file and the measurement mode for the i1Display.
The measurement mode is one of the following value:
    - CCFL: Used for LCD monitors with CCFL backlight.
    - WLED : Used for LCD monitors with White LED backlight monitors.
    - RGBLED : Used for LCD monitors with RGB LED backlight monitors.
    - Phosphor : Used for CRT monitors.
    - Projector : Used for Projectors.
    - VPixx : Used for VIEWPixx, VIEWPixx /3D and PROPixx.
    - EEG : Used for VIEWPixx /EEG monitors.

>> I1('GetMeasurementMode?');

Usage:

mode = I1('GetMeasurementMode');

Gets the measurement mode currently used by the i1Display.
The calibration mode is one of the following value:
    - CCFL: Used for LCD monitors with CCFL backlight.
    - WLED : Used for LCD monitors with White LED backlight monitors.
    - RGBLED : Used for LCD monitors with RGB LED backlight monitors.
    - Phosphor : Used for CRT monitors.
    - Projector : Used for Projectors.
    - VPixx : Used for VIEWPixx, VIEWPixx /3D and PROPixx.
    - EEG : Used for VIEWPixx /EEG monitors.

So to change ...(default vaule is 'VPixx' as a PROPixx is used in the CHBH MEG Lab)

mode = I1('GetMeasurementMode');
mode
mode = 

    'VPixx'
I1('SetMeasurementMode', 'RGBLED');
mode = I1('GetMeasurementMode');
mode
mode =

    'RGBLED'

>> I1('GetTriStimulus?');

Usage:

Lxy = I1('GetTriStimulus'); 

Returns CIE Lxy coordinates of last i1 measurement.

Taking a sample measurement with ‘RGBLED' as the 'mode' ...

Lxy = I1('GetTriStimulus');
Lxy
Lxy =

     94.3362, 0.3781, 0.3791

VPIxx say a second or so exposure is needed to collect a sample, so allow for this time in the code.


>> I1('SetIntegrationTime?');

Usage:

I1('SetIntegrationTime', time);

Sets the integration time used to take a measurement by the i1Display.
It represents the maximum time which could be taken by the i1Display to get a measurement.
The value must be > 0.2 seconds. Default is 0.2 seconds.

>> I1('GetIntegrationTime?');

Usage:

time = I1('GetIntegrationTime');

Gets the integration time used for measurements by the i1Display.
It represents the maximum time which could be taken by the i1Display to get a measurement.

So

time = I1('GetIntegrationTime');
time
time =

    0.2000

So to set the integration time to 1 second ...

I1('SetIntegrationTime', 1);

And to check it’s changed …

time = I1('GetIntegrationTime');
time
time =

    1