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Thread: LG's 3D Light Show Projection on Building

  1. #1
    Senior Member
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    Jun 2005
    East Bay/San Francisco

    LG's 3D Light Show Projection on Building

    LG's 3D light show projection on a building in Berlin. Pretty incredible!!!

    For more information than you probably want:
    From the LG web site: (

    LG lights up Berlin with a spectacular 3D show at IFA
    September 6th, 2010 by joeO

    LG Optimus Event2-[20100905084847667]
    LG marked the opening of IFA 2010 in style by unveiling a giant 3D media façade in Kulturbaruerei, the cultural heart of Berlin, to highlight the upcoming range of devices under the LG Optimus series label.

    The ever-changing 3D artwork on the nearly three-storey high screen (23 x 21m) captured the attention of many a passerby. It started with a countdown on a giant hourglass before viewers were greeted by an “android” before the presentation took viewers on a fifteen minute ride that included whales, ice skaters, giant octopi, and steaming jungles amongst other things. The show concluded with the advice: “Optimize Your Life!” which will be the official tagline of the Optimus Series marketing campaign.

    The grand finale involved the audience becoming the stars as photos they took of themselves on phones provided by LG had their images displayed on the media façade.

    First announced in July, LG Optimus Series is LG’s advanced line-up of smartphones and tablet devices featuring the latest in mobile technology. Optimus, which means “best” in Latin, will be comprised of devices ranging from entry to premium with various form factors to meet the unique needs of every customer. LG will be introducing approximately 10 new smart devices worldwide in the second half of this year under the LG Optimus Series label.

    And if that isn't enough for the techie in you:
    1) use a laser depth scanner to map the 3D surface of the building.

    2) run test projections over each point on the building to determine what color/intensity to project on each point in order to compensate for the color of the building (for example, to get an even “white” across the entire surface, some points will need more total intensity than others because the building is darker at those points — this can vary by color band (red, green, blue). Note that this does not work well with windows.

    Steps 1 & 2 might be done in real time as the video proceeds, to compensate for things like rippling flags or opening doors, or anything else that might move on the projection surface.

    3) Computer takes desire image and for each point in image determines where to project it so it will be in the correct position for the audience. There will be a single position in the audience for which the effect will be “perfect”, and “good enough” for points nearby. The camera that recorded this event was probably at/near the optimal location. A mostly flat building wall will work best (or course a perfectly flat movie-screen would be optimal), and allows for a wider area for the audience to perceive the video with minimal distortions. However, the process could in principle work on complex surfaces of widely varying depths, but the point of view of the audience for an effective illusion would be increasingly constrained.

    Because it is dark outside and the image is bright and high contrast, perception of the image overwhelms perception of the building.

    3a) The “projector” is almost certainly a set of 3 lasers — red, green, blue. Traditional image project methods would have issues with focusing the variable depth projection surface.

    4) Design/animate the video to take into account the building itself, so it can look like you are changing the building, rather than projecting just any video image onto it. This enhances the effect since, as noted above, the process does not work well on windows or highly reflective surfaces.

    All “3D” effects are just normal video — not stereographic [as with 3D glasses at movies, let alone holographic or anything like that. So the “3D” is like any other video. But the choice of what to show in the video, and how it is animated, no doubt enhances the illusion of 3D.

    All the best,

  2. #2
    Senior Member Donno's Avatar
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    Jan 2004
    Whately, MA United States
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    VERY cool, GJ! I watched a couple more that showed up when it ended.
    Don - Grad Student Emeritus
    T3 ASIA A 25 years post injury

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