| Presentation | 2012-09-03 Hierarchical Properties of Multi-resolutions of Optical Flow Yusuke KAMEDA, Atsushi IMIYA, Tomoya SAKAI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Most of the methods to compute optical flows are variational-technique based methods, which assume that image functions have spatiotemporal continuities and also the appearance motions are small. In the viewpoint of the discrete errors of spatial- and time-differentials, the appropriate resolution of optical flow depends on both the resolution and frame rate of images since there is a problem about the accuracy of the discrete approximations of derivatives. Therefore, in the case of low frame-rate images, the appropriate resolution of optical flow should be lower than the resolution of images. However, many traditional methods estimate optical flow with same resolution of the images. Therefore, if the resolution is too high, down-sampling the images is effective to variational-technique based methods. In this paper, we analyze the appropriate resolutions of optical flows estimated by variational optical-flow computations from the viewpoint of the error analysis of optical flows. To analyze appropriate resolutions, we use hierarchical structures constructed from the multi-resolutions of images. Numerical results show that decreasing image resolutions is effective to compute optical flows by variational optical-flow computations in low frame-rate sequences. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | optical flow / vaiational method / multi-resolution / low frame-rate |
| Paper # | PRMU2012-46,IBISML2012-29 |
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| Conference Information | |
| Committee | PRMU |
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| Conference Date | 2012/8/26(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | Hierarchical Properties of Multi-resolutions of Optical Flow |
| Sub Title (in English) | |
| Keyword(1) | optical flow |
| Keyword(2) | vaiational method |
| Keyword(3) | multi-resolution |
| Keyword(4) | low frame-rate |
| 1st Author's Name | Yusuke KAMEDA |
| 1st Author's Affiliation | Graduate School of Advanced Integration Science Chiba University() |
| 2nd Author's Name | Atsushi IMIYA |
| 2nd Author's Affiliation | Institute of Media and Information Technology Chiba University |
| 3rd Author's Name | Tomoya SAKAI |
| 3rd Author's Affiliation | Graduate School of Engineering, Nagasaki University |
| Date | 2012-09-03 |
| Paper # | PRMU2012-46,IBISML2012-29 |
| Volume (vol) | vol.112 |
| Number (no) | 197 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |