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Correlating Fourier descriptors of local patches for road sign recognition
| Content Provider | Scilit |
|---|---|
| Author | Larsson, F. Felsberg, M. |
| Editor | ForsseĢn, P. -E. |
| Copyright Year | 2011 |
| Description | The Fourier descriptors (FDs) is a classical but still popular method for contour matching. The key idea is to apply the Fourier transform to a periodic representation of the contour, which results in a shape descriptor in the frequency domain. FDs are most commonly used to compare object silhouettes and object contours; the authors instead use this well-established machinery to describe local regions to be used in an object-recognition framework. Many approaches to matching FDs are based on the magnitude of each FD component, thus ignoring the information contained in the phase. Keeping the phase information requires us to take into account the global rotation of the contour and shifting of the contour samples. The authors show that the sum-of-squared differences of FDs can be computed without explicitly de-rotating the contours. The authors compare correlation-based matching against affine-invariant Fourier descriptors (AFDs) and WARP-matched FDs and demonstrate that correlation-based approach outperforms AFDs and WARP on real data. As a practical application the authors demonstrate the proposed correlation-based matching on a road sign recognition task. |
| Related Links | http://liu.diva-portal.org/smash/get/diva2:397235/FULLTEXT01 |
| Ending Page | 254 |
| Page Count | 11 |
| Starting Page | 244 |
| ISSN | 14777819 |
| e-ISSN | 14777819 |
| DOI | 10.1049/iet-cvi.2010.0040 |
| Journal | IET Computer Vision |
| Issue Number | 4 |
| Volume Number | 5 |
| Language | English |
| Publisher | Institution of Engineering and Technology (IET) |
| Publisher Date | 2011-01-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: IET Computer Vision Artificial Intelligence Sum-of-squared Difference Contour Periodic Representation Frequency Domain Road Sign Recognition Shape Descriptor Correlation-based Matching Contour Global Rotation Phase Information Local Patch Object Recognition Fourier Transform Object Contour Local Region Contour Matching Warp-matched Fd Affine-invariant Fourier Descriptor Object Silhouette |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surgery Oncology |
