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Object representation using circular harmonics
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Cross, Nicola and Wilson, Roland (1994) Object representation using circular harmonics. University of Warwick. Department of Computer Science. (Department of Computer Science research report). (Unpublished)
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PDF (Department of Computer Science Research Report)
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Abstract
The system presented here is one that can be used to project information describing the corners of an object from some storage area, down onto a network. The idea is to reinforce the detection of object boundaries performed by a Hopfield network. These networks are efficient in terms of detecting edges, but are less efficient at detecting corners. This is because the Hopfield network works by assuming that an edge will continue in a more or less straight line. A ripple filter is used; this projects ripples of vectors onto the areas where corners are expected. Each vector consists of: a magnitude that indicates a level of certainty about the position of the corner, and a direction which indicates the expected orientation of the corner. The vectors are used by the Hopfield network to override existing straight links with curved links, so helping it to detect corners. We describe a method for projecting sectors of the ripples using circular harmonics. Possible extensions and improvements to the work are considered.
| Item Type: | Report | ||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||
| Library of Congress Subject Headings (LCSH): | Image analysis | ||||
| Series Name: | Department of Computer Science research report | ||||
| Publisher: | University of Warwick. Department of Computer Science | ||||
| Official Date: | 2 August 1994 | ||||
| Dates: |
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| Number: | Number 269 | ||||
| Number of Pages: | 19 | ||||
| DOI: | CS-RR-269 | ||||
| Institution: | University of Warwick | ||||
| Theses Department: | Department of Computer Science | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Unpublished | ||||
| Related URLs: |
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