What’s More Important: Color Accuracy and Contrast or Brightness in Conference Room Presentations?

Insight Media has published a new white paper titled: What’s More Important: Color Accuracy and Contrast or Brightness in Conference Room Presentations?  The impetus for this paper was the release of the BenQ Colorific HC1200, a projector that is optimized for color accuracy and high contrast, rather than traditional brightness measurements.

Historically, the projection industry has focused on offering more and more lumens.  But is this the right metric to be focused on?  Maybe end users, integrators and manufacturers should focus more on the color accuracy and contrast of the projector instead of assuming that more brightness is always better.  This is the question that this white paper asks.  But the purpose is not to provide a definitive answer to the question, but rather, to lay out some facts and hypothesis and start an industry dialog.

The white paper provides background sections on these key elements of image quality and at the end profiles a set of tests done that represent one case study for a conference room set up.  We encourage others to do additional studies. Download the whitepaper now and weigh in on this topic.

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About the Author: Chris Chinnock

Chris Chinnock

Chris Chinnock the founder and president of Insight Media. His areas of focus include the 4K ecosystem, laser displays, 3D/Light Field/Holographic displays, advanced imaging technology (HDR, HFR, WCG), VR/AR/MR and emerging technologies and products in the broadcast, consumer electronics, ProAV and the display industries.

  • Chris Chinnock

    Q: Is this projector available in Europe do you know. – Ian
    A: BenQ says only in the US now, but maybe in Europe later if there is demand

  • Chris Chinnock

    Q: Is this projector available in Europe do you know. – Ian
    A: BenQ says only in the US now, but maybe in Europe later if there is demand

  • Chris Chinnock

    Chris

    Interesting article and based on my experience accurate colour does
    impact perceived brightness but not as much as one other factor of
    calibration. This all points to something the industry is sadly lacking,
    a performance standard for environments with ambient light. For instance
    projection calibration to REC-709 is only for a mere 14fc, but if a room is
    11fc there is no standard except for contrast which make verification and
    reporting very difficult if not impossible. All you can do is ensure
    lights off colours and white point are correct, then turn on the lights and
    measure the system to ensure uniformity and compliance with ratio
    specifications for the system. The missing link is the gamma curve for a
    brighter environment, is not standardized. This makes a huge difference
    in a final image. Colour does impact final image quality as well but in
    my experience not as much as an improper gamma curve. If you do know a
    real standard related to gamma in lite environments I am all ears.

    Regards,

    James Fife, MIA-P, DA

    Designer

    Engineering Harmonics Inc.

    29A Leslie Street, Toronto, ON M4M 3C3

    t 416 465 3378 x225

    w engineeringharmonics.com

    ———————–

    Chris / James,

    This is a common problem, and
    one of the issues that we see with our PG monitors as well. For
    color critical proofing, JC Penny’s, Hearst, and Time / Life have color neutral
    viewing rooms where everything is controlled. In the photo
    retouching community, it is always done in a dark room for the same reason,
    since trying to correct for sunlight, and other elements if it is critical is
    not exactly easy – particularly if the light changes through the day.

    Yet when we talked to these
    folks in developing the projector, it was clear that we had to start with a
    color correct image. In our HT projector line, we have the ISF
    calibration tools to correct for the reflection from carpet, lighting color and
    other pieces, but for a first product, we felt that this might be confusing or
    overwhelming – or of course too expensive. We may look at this in
    future products if needed.

    The ability to compensate for
    ambient lighting is a great idea, and certainly needs more exploration.

    Bob Wudeck

    BenQ

    —————————————–

    Bob

    An ideal way would be to have a fixed installation position USB camera
    that could connect to a small format PC running an applications. The
    screen would be pre-identified technician within the software. The nice
    thing is that the screen colour – white, gray etc can be taken into
    account. Ideally a copy of the image via a USB connection between the
    projector and the PC would be made allowing an input to output comparison
    allowing real auto calibration of the environment as a whole.

    Regards,

    James Fife, MIA-P, DA

    Designer

    Engineering Harmonics Inc.

    29A Leslie Street, Toronto, ON M4M 3C3

    t 416 465 3378 x225

    w engineeringharmonics.com

    —————————

    James,

    This is a nice idea– a closed
    loop to make dynamic color adjustments. I will pass along to my
    technical team.

    Bob

    —————————

    To really set it apart for user experience, you could adjust the
    colour to the ambient light colour to make white the room white colour, but
    adding a function to allow a white field to be brought into the view of the
    camera. This could then be measured and you would be white balancing the
    projector. D65 is great in all, but if you’re in a room with 3600k lights
    it is just super blue when you look up front writing a note.

    As a side advantage this would make the image captured by cameras appear
    to be the correct colour temperature. 😉 Think broadcast applications
    for sets where this is done to the displays to make them look correct on camera
    capture even though they appear dramatically red in tungsten light.

    Regards,

    James Fife, MIA-P, DA

    Designer

  • Chris Chinnock

    Afraid not – only reported as “dim.”

    ———–

    Chris,

    I was enjoying this paper until the part where you didn’t report measured ambient light in the room during the comparison of the three projector systems. Do you have any data on that critical piece of information?

    Kevin

  • Chris Chinnock

    From: Erkki Soininen [mailto:erkki.soininen@canatu.com]

    Sent: Thursday, January 29, 2015 11:27 AM

    To: Chris Chinnock

    Subject: FW: white paper

    Thank you Chris,

    Very good paper! The System contrast ratio PISCR makes perfect
    sense. I have been always irritated about these 1:1 000 000 contrast
    ratios which are absolutely non-sense for any practical purposes. The
    same issue of “neglecting” ambient illumination and reflections holds for flat
    panels. In fact, we are trying to make our contribution in educating the
    field by making a series of short white papers/articles in Canatu Newsletter
    regarding touch display optics and the relevance of real life contrast.
    Would you like to get the first 2 articles, they are short, will be published
    in a couple of weeks from now?

    Regarding relevance of color saturation for viewer’s brightness
    sensation, this is also interesting. I wonder if you could actually
    explain this by using the eye’s photopic curve which dictates that eye is less
    sensitive for blue and red as compared to green-yellow, and hence if you have a
    wide color gamut with deep blues and reds the same lumen value results in a
    higher photopic sensation as compared to lower color gamut with less deep blues
    and reds. Perhaps this is the same as the HK effect that you mention?
    Anyways, I believe in your theory, the photopic curve might just connect this
    to the human physiology?

    Br, Erkki

    Erkki Soininen

    VP Marketing and Sales

    +358 40 5741 504

    erkki.soininen@canatu.com

    skype: erkki.soininen

    CANATU Oy | http://www.canatu.com

    Postal and street address:
    Konalankuja 5, FI-00390 Helsinki, FINLAND

  • Chris Chinnock

    Dear Chris,

    This is very interesting.

    I would like to know more about how Color Management tools that measure and load the Profiles can affect the results. I would also like to know about Laser light source impact on projector video quality.

    Best regards, Nori

    Norihisa Suzuki
    President & CEO
    Zaxel Systems, Inc.
    1600 Wyatt Drive, Suite 13
    Santa Clara, CA 95054, USA
    P +1-408-727-6403
    C +1-650-533-8456