| Presentation | 1998/9/11 Recognition of Blurred Images Based on Phase Invariants Jianyin Lu, Yasuo Yoshida, |
|---|---|
| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recognition of a blurred image against an image database plays an important role in many application areas. Classical methods try to estimate the blur parameters and to restore the image before recognition. In this paper, we propose an alternative approach that need no image restoration. We show that the FFT phase of an image is invariant with respect to blur if the PSF of the blur system is symmetric and the FFT of PSF is positive. Then, we derive a phase cross-correlation function between two images which becomes a delta function if one of the image is a blurred version of another. An recognition algorithm based on the function is introduced. Numerical experiments using number images of a car license plate are presented to illustrate the utilization of the algorithm. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | phase invariant / blurred image / symmetric blur / correlation / image recognition |
| Paper # | DSP98-81,SP98-60 |
| Date of Issue |
| Conference Information | |
| Committee | DSP |
|---|---|
| Conference Date | 1998/9/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Digital Signal Processing (DSP) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Recognition of Blurred Images Based on Phase Invariants |
| Sub Title (in English) | |
| Keyword(1) | phase invariant |
| Keyword(2) | blurred image |
| Keyword(3) | symmetric blur |
| Keyword(4) | correlation |
| Keyword(5) | image recognition |
| 1st Author's Name | Jianyin Lu |
| 1st Author's Affiliation | Faculty of Engineering and Design, Kyoto Institute of Technology() |
| 2nd Author's Name | Yasuo Yoshida |
| 2nd Author's Affiliation | Faculty of Engineering and Design, Kyoto Institute of Technology |
| Date | 1998/9/11 |
| Paper # | DSP98-81,SP98-60 |
| Volume (vol) | vol.98 |
| Number (no) | 262 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |