Numerical Shape from Shading and Occluding Contours in a Single View
An iterative method of using occluding boundary information is proposed to compute surface slope from shading. We use a stereographic space rather than the more commonly used gradient space in order to express occluding boundary information. Further, we use "average" smoothness cons...
| Main Authors: | , |
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| Language: | en_US |
| Published: |
2004
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| Online Access: | http://hdl.handle.net/1721.1/5713 |
| _version_ | 1811078833797857280 |
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| author | Ikeuchi Katsushi |
| author_facet | Ikeuchi Katsushi |
| author_sort | Ikeuchi |
| collection | MIT |
| description | An iterative method of using occluding boundary information is proposed to compute surface slope from shading. We use a stereographic space rather than the more commonly used gradient space in order to express occluding boundary information. Further, we use "average" smoothness constraints rather than the more obvious "closed loop" smoothness constraints. We develop alternate constraints from the definition of surface smoothness, since the closed loop constraints do not work in stereographic space. We solve the image irradiance equation iteratively using a Gauss-Seidel method applied to the constraints and boundary information. Numerical experiments show that the method is effective. Finally, we analyze SEM (Scanning Electron Microscope) pictures using this method. Other applications are also proposed. |
| first_indexed | 2024-09-23T11:06:08Z |
| id | mit-1721.1/5713 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:06:08Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/57132019-04-12T08:27:14Z Numerical Shape from Shading and Occluding Contours in a Single View Ikeuchi Katsushi An iterative method of using occluding boundary information is proposed to compute surface slope from shading. We use a stereographic space rather than the more commonly used gradient space in order to express occluding boundary information. Further, we use "average" smoothness constraints rather than the more obvious "closed loop" smoothness constraints. We develop alternate constraints from the definition of surface smoothness, since the closed loop constraints do not work in stereographic space. We solve the image irradiance equation iteratively using a Gauss-Seidel method applied to the constraints and boundary information. Numerical experiments show that the method is effective. Finally, we analyze SEM (Scanning Electron Microscope) pictures using this method. Other applications are also proposed. 2004-10-01T20:32:14Z 2004-10-01T20:32:14Z 1979-11-01 AIM-566 http://hdl.handle.net/1721.1/5713 en_US AIM-566 38 p. 11868504 bytes 8247980 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | Ikeuchi Katsushi Numerical Shape from Shading and Occluding Contours in a Single View |
| title | Numerical Shape from Shading and Occluding Contours in a Single View |
| title_full | Numerical Shape from Shading and Occluding Contours in a Single View |
| title_fullStr | Numerical Shape from Shading and Occluding Contours in a Single View |
| title_full_unstemmed | Numerical Shape from Shading and Occluding Contours in a Single View |
| title_short | Numerical Shape from Shading and Occluding Contours in a Single View |
| title_sort | numerical shape from shading and occluding contours in a single view |
| url | http://hdl.handle.net/1721.1/5713 |
| work_keys_str_mv | AT ikeuchi numericalshapefromshadingandoccludingcontoursinasingleview AT katsushi numericalshapefromshadingandoccludingcontoursinasingleview |