Abstract
The problem of edge evaluation in relation to image gradient-based edge detectors has been widely studied, and there exist a range of edge evaluation techniques that are appropriate to such edge detectors. Although discrete second derivative operators often form the basis of edge detection methods, whereby zero-crossings are used to locate edge pixels, rather less attention has been paid to the development of edge evaluation techniques that are directly appropriate to zero-crossing methods. We propose a new evaluation technique that performs edge sensitivity analysis with respect to angular orientation and displacement errors for edges located by such discrete second derivative operators. The technique applies a finite element interpolation to the output values of the second derivative operator. Hence the method is used to directly evaluate edges located by a second derivative operator without the need to use a supplementary first derivative operator for gradient approximation.
Original language | English |
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Title of host publication | Unknown Host Publication |
Publisher | IEEE Computer Society |
Pages | 594-599 |
Number of pages | 6 |
DOIs | |
Publication status | Published (in print/issue) - Sept 2003 |
Event | 12th International Conference on Image Analysis and Processing (ICIAP 2003) - Mantova, Italy Duration: 1 Sept 2003 → … |
Conference
Conference | 12th International Conference on Image Analysis and Processing (ICIAP 2003) |
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Period | 1/09/03 → … |
Keywords
- second derivative edge detectors
- performance evaluation
- zero-crossings
- edge sensitivity analysis