Photosynth

Ian Dreher

What is Photosynth?

• Microsoft Live Labs• Analyzes digital photographs and generates

3D model (photos, point cloud)• Point cloud? (common points between

images)

Capabilities

• Walk or Fly (Virtual tour)• Zoom (Seadragon)• Viewing Angles • See where photos were taken (geotag)

Process

• Analyzes multiple photographs

• Interest point detection

• Bundle adjustment (angle, distance, 3D position)

Digital Pictures From Morse Hall Office

Morse Hall Office Photosynth Viewer

Problems

Problem: Going around corners (Buildings)Solution: Take picture every 15 degree change

Problem: Exact Replication (Morse Hall)Solution: Take pictures from wider angles

West Facing Entrance East Facing Entrance

Nice and Synthy

Hawaii Photosynth

Thank You For Listening