- Microsoft Live Labs Photosynth
name = Microsoft Live Labs
caption = Photosynth technology preview showing
Piazza San Pietro, Rome
latest_release_version = 2.0.1403.12
latest_release_date = release date and age|2008|09|08
website = [http://www.photosynth.net http://www.photosynth.net]
Photosynth is a software application from
Microsoft Live Labsand the University of Washingtonthat analyzes digital photographs to build a three-dimensional point cloudof a photographed object. [ [http://news.com.com/2100-1038_3-6134160.html Microsoft shoots for 3D multi-photo viewer | CNET News.com ] ] Pattern recognition components compare portions of images to create points, which are then compared to convert the image into a model. Users are able to view and generate their own models using a software tool available for download at the Photosynth website.
Microsoft released a free tech preview version on
November 9, 2006, however, users could view models generated by Microsoft or the BBC, but not create their own models at that time. [Cnet News [http://news.cnet.com/8301-17939_109-10020637-2.html?part=rss&subj=news&tag=2547-1_3-0-5 Microsoft launches 3D wonder Photosynth for consumers] ] Microsoft teamed up with NASAon August 6, 2007allowing users to preview its Photosynth technology showing the Space Shuttle Endeavour. On August 20, 2007, a preview showing the tiles of Endeavour during the backflip process is also available for viewing.
August 20, 2008, Microsoft officially released Photosynth to the public, allowing users to upload their images and generate their own Photosynth models.
The Photosynth technology works in two steps. The first step involves the analysis of multiple photographs taken of the same area. Each photograph is processed using an
interest point detectionand matching algorithm developed by Microsoft Researchwhich is similar in function to UBC's Scale-invariant feature transform. This process identifies specific features, for example the corner of a window frame or a door handle. Features in one photograph are then compared to and matched with the same features in the other photographs. Thus photographs of the same areas are identified. By analyzing the position of matching features within each photograph, the program can identify which photographs belong on which side of others. By analyzing subtle differences in the relationships between the features (angle, distance, etc.), the program identifies the 3D position of each feature, as well as the position and angle at which each photograph was taken. This process is known scientifically as Bundle adjustmentand is commonly used in the field of photogrammetry, with similar products available such as Imodeller, D-Sculptor, and Rhinoceros. This first step is extremely computationally intensive, but only has to be performed once on each set of photographs.
The second step involves the intelligent display of and navigation through the 3D point cloud of features identified in the first step. This is done with the publicly downloadable Photosynth viewer. The viewer resides on a client computer and maintains a connection to a server that stores the original photographs. It enables a user to, among other things, see any of the photographs from their original vantage point. It incorporates technology Microsoft obtained through its acquisition of Seadragon in January 2006. The Seadragon technology enables smooth zooming into the high-resolution photographs without downloading them to the user's machine.
The Photosynth viewing software is only available to the Windows Vista and XP operating systems.
*Walk or fly through a scene to see photos from any angle
*Zoom in or out of a photo
*See where pictures were taken in relation to one another
*Smoothly change viewing angle between nearby photos
*Smoothly zoom in and out of high-resolution photos
*Find similar photos to the one you're currently viewing
In the media
*On April 30, 2008, Photosynth was featured in the television show [Seattle Post-Intelligencer. [http://seattlepi.nwsource.com/business/361289_msftcsi01.html Microsoft's Photosynth stars in 'CSI' Episode] ]
Microsoft Live Labs Deepfish
Panopticon (Internet culture)
* [http://www.photosynth.net Microsoft Live Labs - Photosynth]
* [http://www.livelabs.com/Seadragon Microsoft Live Labs - Seadragon]
* [http://www.livelabs.com Microsoft Live Labs]
* [http://blogs.msdn.com/photosynth/default.aspx Photosynth Team Blog]
* [http://phototour.cs.washington.edu Official University of Washington Photo Tourism Site]
* [http://www.ted.com/index.php/talks/blaise_aguera_y_arcas_demos_photosynth.html - TEDTalks: Blaise Aguera Showcases Photosynth Technology]
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