Hierarchichal attributed graph representation and recognition of handwritten Chinese characters
Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Computer Science Bibliography: leaves 160-168. This thesis presents a system which is capable of recognizing handwritten Chinese characters. The hierarchical attributed graph representation (HAGR), a two-level graph, is introduced to describ...
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ftmemorialunivdc:oai:collections.mun.ca:theses2/201015 2023-05-15T17:23:31+02:00 Hierarchichal attributed graph representation and recognition of handwritten Chinese characters Ren, Ying, 1964- Memorial University of Newfoundland. Dept. of Computer Science 1991 xiii, 168 leaves : ill. Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses2/id/201015 Eng eng Electronic Theses and Dissertations (17.81 MB) -- http://collections.mun.ca/PDFs/theses/Ren_Ying.pdf 76099348 http://collections.mun.ca/cdm/ref/collection/theses2/id/201015 The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Chinese characters--Data processing Optical character recognition devices Text Electronic thesis or dissertation 1991 ftmemorialunivdc 2015-08-06T19:17:16Z Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Computer Science Bibliography: leaves 160-168. This thesis presents a system which is capable of recognizing handwritten Chinese characters. The hierarchical attributed graph representation (HAGR), a two-level graph, is introduced to describe the structural and statistical information of handwritten Chinese characters. The first level describes radicals and relations between radicals within a character, the second level describes strokes and relations between strokes in a radical. With HAGR, the recognition process becomes a simple task of graph matching. A cost function mapping a candidate to a model graph is introduced. This approach can tolerate the variations of HAGR which reflect the instablities and variabilities of handwritten Chinese characters resulting from different writing styles. Several rules have been used to re-arrange the order of the vertices of the graphs in order to avoid the combinatorial explosion inherent in graph matching. Based on HAGR, the model database is organized as a heterogeneous multi-way tree structure. For an input character, the search process can be divided into a number of simple and local decisions at different levels of the tree to find a corresponding model character in the database. The matching process is very efficient and accurate, and as well the system can acquire representations of characters by a learning process. Several HAGRs of samples of a character can be synthesized into a single HAGR of the character which can then be included in the model database. In addition, the learning process can update the models of characters with the HAGRs of their samples. The system is implemented in C on a MIPS/M-120 running RISC/OS (Version-3.1). Thesis Newfoundland studies University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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English |
topic |
Chinese characters--Data processing Optical character recognition devices |
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Chinese characters--Data processing Optical character recognition devices Ren, Ying, 1964- Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
topic_facet |
Chinese characters--Data processing Optical character recognition devices |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 1991. Computer Science Bibliography: leaves 160-168. This thesis presents a system which is capable of recognizing handwritten Chinese characters. The hierarchical attributed graph representation (HAGR), a two-level graph, is introduced to describe the structural and statistical information of handwritten Chinese characters. The first level describes radicals and relations between radicals within a character, the second level describes strokes and relations between strokes in a radical. With HAGR, the recognition process becomes a simple task of graph matching. A cost function mapping a candidate to a model graph is introduced. This approach can tolerate the variations of HAGR which reflect the instablities and variabilities of handwritten Chinese characters resulting from different writing styles. Several rules have been used to re-arrange the order of the vertices of the graphs in order to avoid the combinatorial explosion inherent in graph matching. Based on HAGR, the model database is organized as a heterogeneous multi-way tree structure. For an input character, the search process can be divided into a number of simple and local decisions at different levels of the tree to find a corresponding model character in the database. The matching process is very efficient and accurate, and as well the system can acquire representations of characters by a learning process. Several HAGRs of samples of a character can be synthesized into a single HAGR of the character which can then be included in the model database. In addition, the learning process can update the models of characters with the HAGRs of their samples. The system is implemented in C on a MIPS/M-120 running RISC/OS (Version-3.1). |
author2 |
Memorial University of Newfoundland. Dept. of Computer Science |
format |
Thesis |
author |
Ren, Ying, 1964- |
author_facet |
Ren, Ying, 1964- |
author_sort |
Ren, Ying, 1964- |
title |
Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
title_short |
Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
title_full |
Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
title_fullStr |
Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
title_full_unstemmed |
Hierarchichal attributed graph representation and recognition of handwritten Chinese characters |
title_sort |
hierarchichal attributed graph representation and recognition of handwritten chinese characters |
publishDate |
1991 |
url |
http://collections.mun.ca/cdm/ref/collection/theses2/id/201015 |
genre |
Newfoundland studies University of Newfoundland |
genre_facet |
Newfoundland studies University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (17.81 MB) -- http://collections.mun.ca/PDFs/theses/Ren_Ying.pdf 76099348 http://collections.mun.ca/cdm/ref/collection/theses2/id/201015 |
op_rights |
The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission. |
_version_ |
1766112965316050944 |