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Microsoft Live Labs: Photosynth - What is Photosynth?
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- The fastest, smoothest image zooming you ever saw — Whether it's 1 megapixel or 1 gigapixel, Seadragon can open any image in a flash, and zoom and pan with buttery smoothness. Images "come into focus" continuously as data comes across the network, and the speed of this focusing is only determined by your screen size and bandwidth, not the size of your image.
- Big collections? No problem — Seadragon can browse collections of many thousands of full resolution images just as smoothly as a single image. Photosynth collections typically have hundreds of photos, but the same performance characteristics apply to collections of 5,000 images and beyond.
- The fastest, smoothest image zooming you ever saw — Whether it's 1 megapixel or 1 gigapixel, Seadragon can open any image in a flash, and zoom and pan with buttery smoothness. Images "come into focus" continuously as data comes across the network, and the speed of this focusing is only determined by your screen size and bandwidth, not the size of your image.
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Photosynth incorporates Seadragon�s amazing new smooth digital rendering and zoom capabilities.
digg - Microsoft Live Labs: Photosynth (Awesome!)
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@rhinopig: There's a pretty nifty algorithm called SIFT (Scale invariant feature transform: http://en.wikipedia.org/wiki/Scale-invariant_feature_transform ). That algorithm detects characteristic image features regardless of image rotation and resolution and is relatively robust against illumination variation. It seems like an ideal candidate for what Photosynth does. They take a bunch of pictures, extract characteristic features and match them with features in other pictures. Then they have a huge equation system of rays through the scene with camera and feature positions as unknowns and feature matches as constraints. After solving that equation system, they get the point cloud that you see in the video. Then it's only a matter of selecting the right images (filter for camera position and angle) and showing images at the appropriate depth. I bet the devil is in the details, but in a nutshell that's what's going on.
American Chronicle: Microsoft�s Photosynth a huge step in visual technology
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http://phototour.cs.washington.edu/Photo_Tourism.pdf
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According to Photosynth�s official webpage (http://labs.live.com/photosynth/), the program is a �new technology from Microsoft Live Labs [the team�s first product release] that will change the way you think about digital photos forever. Photosynth takes a large collection of photos of a place or object, analyzes them for similarities, and displays them in a reconstructed 3-Dimensional space.�
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