A Photosynth experience begins with a bunch of digital photos. They might all have been taken by one person, or they might be a mixture of images from many different cameras, shooting conditions, dates, times of day, resolutions, and so on.
Each photo is processed by computer vision algorithms to extract hundreds of distinctive features, like the corner of a window frame or a door handle. Photos that share features are then linked together in a web. When the same feature is found in multiple images, its 3D position can be calculated. It's similar to depth perception - what your brain does to perceive the 3D positions of things in your field of view based on their images in both of your eyes. Photosynth's 3D model is just the cloud of points showing where those features are in space.
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Sunday, May 18, 2008
What is PhotoSynth?
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