Build Your Own 3D Scanner: 3D Scanning with Swept-Planes

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Course Schedule TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A A A A A

Triangulation by Laser Striping M. J. Leotta, A. Vandergon, and G. Taubin. 3 D Slit Scanning With Planar Constraints . Computer Graphics Forum , 2008 ,[object Object],[object Object],[object Object],[object Object]

3D Photography on Your Desk: Bouguet and Perona [ICCV 1998] J.-Y. Bouguet and P. Perona. 3D photography on your desk . Intl. Conf. Comp. Vision , 1998 ,[object Object],[object Object],[object Object]

Assembling Your Own Scanner ,[object Object],[object Object],[object Object],[object Object]

Swept-Plane Reconstruction Geometry

[object Object],[object Object],[object Object],Video Processing: Assigning Per-Pixel Shadow Thresholds

Video Processing: Spatial Shadow Edge Localization ,[object Object],[object Object],[object Object],[object Object],400 600 800 -60 -40 -20 0 20 40 60 column index I 60 (x,y) - I shadow (x,y) 540 550 560 570 580 -60 -40 -20 0 20 40 column index I 60 (x,y) - I shadow (x,y)

Video Processing: Temporal Shadow Edge Localization ,[object Object],[object Object],[object Object],80 100 120 140 -40 -20 0 20 40 frame index I(x,y,t) - I shadow (x,y) crossing frame index for leading shadow crossing frame index for trailing shadow frame index 80 100 120 140

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Course Schedule

Modeling Lens Distortion G. Bradski and A. Kaehler. Learning OpenCV . O’Reilly Media, 2008 radial distortion tangential distortion normalized image coordinates distorted image coordinates

Intrinsic Camera Calibration Camera Calibration Input ,[object Object],[object Object],[object Object],[object Object],[object Object],1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 4 4 4 5 5 6 6 7 Estimated Camera Lens Distortion Map camera coordinate system world coordinate system intrinsic parameters extrinsic parameters

Demo: Camera Calibration in Matlab J.-Y. Bouguet. Camera Calibration Toolbox for Matlab . http://www.vision.caltech.edu/bouguetj/calib_doc/

Demo: Mapping Pixels to Optical Rays ,[object Object],[object Object],[object Object],[object Object],[object Object]

Alternatives for Shadow Plane Calibration J.-Y. Bouguet and P. Perona. 3D photography on your desk . Intl. Conf. Comp. Vision , 1998

Additional Reconstruction Examples J.-Y. Bouguet and P. Perona. 3D photography on your desk . Intl. Conf. Comp. Vision , 1998 J. Kim and J. Wu. Scanning with Shadows . CSE 558 Project Report (U. Washington), 2001 P. Blaer, N. Hasan, C. Tripp, and L. Volchok. 3D Desktop Photography by Eclipse . Project Report (Columbia), 2001 J. Kubicky. Home-Brew 3-D Photography . EE 149 Project Report (Caltech), 1998

Visualizing Point Clouds: Point-based Rendering via Splatting *See the SIGGRAPH 2009 course: Point Based Graphics – State of the Art and Recent Advances by Markus Gross. ,[object Object],[object Object],[object Object],[object Object]

Visualizing Point Clouds: Splatting with normal vectors and colors

Visualizing Point Clouds: File Formats ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],PointSet { coord Coordinate { point [ 0 -1 2, 1 0 0, -2 3 -1 ] } color Color { color [ 1 0 0, 0 1 0, 1 1 0 ] } }

Visualizing Point Clouds: File Formats ,[object Object],[object Object],[object Object],[object Object],[object Object],IndexedFaceSet { coord Coordinate { point [ 0 -1 2, 1 0 0, -2 3 -1 ] } colorPerVertex TRUE color Color { color [ 1 0 0, 0 1 0, 1 1 0 ] } normalPerVertex TRUE normal Normal { vector [ 1 0 0, 0 1 0, 0 0 1 ] } }

Visualizing Point Clouds: BYO3D Java Viewer

Visualizing Point Clouds: Pointshop 3D [ Zwicker et al. 2002] M. Zwicker, M. Pauly, O. Knoll, M. Gross. Pointshop 3D: An Interactive System for Point-Based Surface Editing . ACM SIGGRAPH, 2002

How to Get the Source Code http://mesh.brown.edu/byo3d

For More Details http://mesh.brown.edu/byo3d

Break Next Session: Structured Lighting and Mesh Processing http://mesh.brown.edu/byo3d

Build Your Own 3D Scanner: 3D Scanning with Swept-Planes

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