结构光3D扫描原理课件PPT-经典必看.ppt
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1、Computer Vision,Spring 2006 15-385,-685 Instructor: S. Narasimhan Wean 5403 T-R 3:00pm 4:20pm Lecture #17,Structured Light + Range Imaging Lecture #17,(Thanks to Slides from Levoy, Rusinkiewicz, Bouguet, Perona),3D Scanning,Structured Light Reconstruction,Avoid problems due to correspondence Avoid p
2、roblems due to surface appearance Much more accurate Very popular in industrial settings Reading: Marc Levoys webpages (Stanford) Katsu Ikeuchis webpages (U Tokyo) Peter Allens webpages (Columbia),Stereo Triangulation,I,J,Correspondence is hard!,I,J,Structured Light Triangulation,Correspondence beco
3、mes easier!,Structured Light,Any spatio-temporal pattern of light projected on a surface (or volume). Cleverly illuminate the scene to extract scene properties (eg., 3D). Avoids problems of 3D estimation in scenes with complex texture/BRDFs. Very popular in vision and successful in industrial applic
4、ations (parts assembly, inspection, etc).,Light Stripe Scanning Single Stripe,Camera,Source,Surface,Light plane,Optical triangulation Project a single stripe of laser light Scan it across the surface of the object This is a very precise version of structured light scanning Good for high resolution 3
5、D, but needs many images and takes time,Triangulation,Project laser stripe onto object,Object,Light Plane,Triangulation,Depth from ray-plane triangulation: Intersect camera ray with light plane,Laser,Object,Light Plane,Image Point,Example: Laser scanner,Cyberware face and head scanner,+ very accurat
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