Presented by Dr. Yujia Zhang
Examples:
laser scanner
kinect
-depth from focus ,depth from stereo
Concept :active vision
Passive triangulation:Stereo Vision
Active Triangulation:Structured Light 结构光
- one of cameras replaced by light emitter
- correspondence solved by searching in camera image
- no geometric constraints
Structured light
- any spatio-temporal pattern of light projected on a surface
Classification of structured light patterns
time multiplexing
- high resolution
- robust
- only reconstruct static object
- need large num of patterns
Binary Codes for time multiplexing: $2^n$ strips
N-ary Codes: decrease num of pattern but increased the basis of code and intensity(grey levels/colors)