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Thread: The Visual Microphone: Passive Recovery of Sound from Video

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    Default The Visual Microphone: Passive Recovery of Sound from Video

    When sound hits an object, it causes small vibrations of the object’s surface. We show how, using only high-speed video of the object, we can extract those minute vibrations and partially recover the sound that produced them, allowing us to turn everyday objects—a glass of water, a potted plant, a box of tissues, or a bag of chips—into visual microphones. We recover sounds from highspeed footage of a variety of objects with different properties, and use both real and simulated data to examine some of the factors that affect our ability to visually recover sound. We evaluate the quality of recovered sounds using intelligibility and SNR metrics and provide input and recovered audio samples for direct comparison. We also explore how to leverage the rolling shutter in regular consumer cameras to recover audio from standard frame-rate videos, and use the spatial resolution of our method to visualize how sound-related vibrations vary over an object’s surface, which we can use to recover the vibration modes of an object.





    The Visual Microphone

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    Default Re: The Visual Microphone: Passive Recovery of Sound from Video

    I was just listening to this on NPR. This is a pretty cool but potentially dangerous discovery. I am sure the surveillance community is licking its chops over this one.
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    Default Re: The Visual Microphone: Passive Recovery of Sound from Video

    Now we need to be very careful what and where we are talking, the plant leafs have ears and mouth as any other object surrounding us... Don't like it at all.

    Always look beyond the limits...

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    Default Re: The Visual Microphone: Passive Recovery of Sound from Video

    This will cause the installation of new warning signs: "Smile, you've been filmed by high speed camera, watch your language..."

    Always look beyond the limits...

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