| Presentation | 2012-03-08 Optimal Estimation of Step Line-Edge Based on E-spline Pixel Acqusition Model Akira HIRABAYASHI, Naoya KUNISADA, Pier-Luigi DRAGOTTI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose a line edge extraction algorithm based on an E-spline pixel acquisition model. A straight line-edge can be described by three parameters of orientation, offset, and amplitude. The standard method to extract these parameters is Hough transform, which has a limitation in principle to achieve sub-pixel accuracy. Such a limitation can be resolved by introducing a pixel acquisition model. Conventional approaches along this context used analytic solutions for the three parameters, which are sensitive to noise in pixels. To solve the problem, we propose an optimization approach. We first define a criterion that evaluates a distance between exponential moments obtained from noisy pixel values and its theoretical closed form. Its optimization is conducted by a simple coarse-to-fine search. Computer simulations show that not only noise resilience is much improved by the proposed method but also it extracts line-edges from real images more accurately than the Hough transform. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Edge detection / Canny method / line-edge / Hough transform / point spread function(PSF) |
| Paper # | CAS2011-118,SIP2011-138,CS2011-110 |
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| Conference Information | |
| Committee | CAS |
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| Conference Date | 2012/3/1(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Circuits and Systems (CAS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Optimal Estimation of Step Line-Edge Based on E-spline Pixel Acqusition Model |
| 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 | Naoya KUNISADA |
| 2nd Author's Affiliation | Graduate School of Medicine, Yamaguchi University |
| 3rd Author's Name | Pier-Luigi DRAGOTTI |
| 3rd Author's Affiliation | Faculty of Engineering, Imperial College London |
| Date | 2012-03-08 |
| Paper # | CAS2011-118,SIP2011-138,CS2011-110 |
| Volume (vol) | vol.111 |
| Number (no) | 465 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |