| Presentation | 1998/1/23 An Optical flow method to estimate big motions based on an orthognal function expansion Jinwoo KIM, Kozo OKAZAKI, Shinichi TAMURA, Robert Close, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In computing the optical flow, Horn and Schunck's method which is a representative algorithm is based on differentiation. Therefore it is difficult to estimate the velocity for a large displacement by this algorithm. In this paper, we propose a method for estimating nonuniform motion from sequential images which is based on integral brightness constancy constraints. The equations which transform a source image to a target image are expressed as a function of the displacement field. If marginal effects can be neglected, the form of the transformation integral transform or orthognal expansion can be determined from the expansion coefficients of the two images. The apparent displacement field is then computed iteratively by a projection method which utilizes the functional derivatives of the linearized moment equations. The accuracy of the computed motion is tested by comparing the transformed source image with the target image. We demonstrate that the performance of the orthognal function transform on the data set of large motion movement, shows the reliability and effectiveness of the method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical flow / displacement field / orthognal function transformation / large motion image |
| Paper # | PRMU97-208 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 1998/1/23(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Pattern Recognition and Media Understanding (PRMU) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | An Optical flow method to estimate big motions based on an orthognal function expansion |
| Sub Title (in English) | |
| Keyword(1) | optical flow |
| Keyword(2) | displacement field |
| Keyword(3) | orthognal function transformation |
| Keyword(4) | large motion image |
| 1st Author's Name | Jinwoo KIM |
| 1st Author's Affiliation | Dept. of electrical and electronicss engineering, Faculty of engineering, Fukui University() |
| 2nd Author's Name | Kozo OKAZAKI |
| 2nd Author's Affiliation | Dept. of electrical and electronicss engineering, Faculty of engineering, Fukui University |
| 3rd Author's Name | Shinichi TAMURA |
| 3rd Author's Affiliation | Division of Functional Diagnostic Imaging, Osaka University Medical School |
| 4th Author's Name | Robert Close |
| 4th Author's Affiliation | Cendars-Sinai Medical Center |
| Date | 1998/1/23 |
| Paper # | PRMU97-208 |
| Volume (vol) | vol.97 |
| Number (no) | 501 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |