| Presentation | 2010-05-27 Precise Line-Edge Extraction from Low-Resolution Image by E-Spline Sampling Akira HIRABAYASHI, Pier-Luigi DRAGOTTI, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The standard approach for line-edge extraction from image is Hough transform, which has many difficulties including limitation of accuracy in principle and slow computation. In order to overcome these difficulties, an exact line-edge extraction method which uses point spread function (PSF) information has been proposed. In this method, however, PSF is modeled by B-spline functions, and therefore it is sensitive to noise which may exist in pixels. In order to solve this problem, we propose a line-edge extraction algorithm using E-spline functions as a model of the PSF. Our method is capable of extracting line-edge parameters, including amplitude, orientation, and offset, not only at sub-pixel level but also at exact presicion when pixel values are noiseless. Even in noisy scenario, simulation results show that the proposed method outperforms a similar method based around B-spline functions with gains in standard deviation of 1.86dB for the orientation and 9.64dB for the offset when SNR is 10dB. By combining with Canny edge detector, we show that the proposed method can extract local line-edges. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Edge detection / Canny method / line-edge / Hough transform / point spread function (PSF) |
| Paper # | EA2010-17,SIP2010-17,SP2010-17 |
| Date of Issue |
| Conference Information | |
| Committee | SIP |
|---|---|
| Conference Date | 2010/5/19(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 | Signal Processing (SIP) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Precise Line-Edge Extraction from Low-Resolution Image by E-Spline Sampling |
| Sub Title (in English) | |
| Keyword(1) | Edge detection |
| Keyword(2) | Canny method |
| Keyword(3) | line-edge |
| Keyword(4) | Hough transform |
| Keyword(5) | point spread function (PSF) |
| 1st Author's Name | Akira HIRABAYASHI |
| 1st Author's Affiliation | Graduate School of Medicine, Yamaguchi University() |
| 2nd Author's Name | Pier-Luigi DRAGOTTI |
| 2nd Author's Affiliation | Faculty of Engineering, Imperial College London |
| Date | 2010-05-27 |
| Paper # | EA2010-17,SIP2010-17,SP2010-17 |
| Volume (vol) | vol.110 |
| Number (no) | 55 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |