UM
Edge extraction of images by reconstruction using wavelet decomposition details at different resolution levels
Feng L.3; Suen C.Y.3; Tang Y.Y.2; Yang L.H.1
2000-09-01
Source PublicationInternational Journal of Pattern Recognition and Artificial Intelligence
ISSN02180014
Volume14Issue:6Pages:779-793
AbstractThis paper describes a novel method for edge feature detection of document images based on wavelet decomposition and reconstruction. By applying the wavelet decomposition technique, a document image becomes a wavelet representation, i.e. the image is decomposed into a set of wavelet approximation coefficients and wavelet detail coefficients. Discarding wavelet approximation, the edge extraction is implemented by means of the wavelet reconstruction technique. In consideration of the mutual frequency, overlapping will occur between wavelet approximation and wavelet details, a multiresolution-edge extraction with respect to an iterative reconstruction procedure is developed to ameliorate the quality of the reconstructed edges in this case. A novel combination of this multiresolution-edge results in clear final edges of the document images. This multiresolution reconstruction procedure follows a coarser-to-finer searching strategy. The edge feature extraction is accompanied by an energy distribution estimation from which the levels of wavelet decomposition are adaptively controlled. Compared with the scheme of wavelet transform, our method does not incur any redundant operation. Therefore, the computational time and the memory requirement are less than those in wavelet transform.
DOI10.1016/S0218-0014(00)00051-9
URLView the original
Language英語
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Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Sun Yat-Sen University
2.Hong Kong Baptist University
3.Universite Concordia
Recommended Citation
GB/T 7714
Feng L.,Suen C.Y.,Tang Y.Y.,et al. Edge extraction of images by reconstruction using wavelet decomposition details at different resolution levels[J]. International Journal of Pattern Recognition and Artificial Intelligence,2000,14(6):779-793.
APA Feng L.,Suen C.Y.,Tang Y.Y.,&Yang L.H..(2000).Edge extraction of images by reconstruction using wavelet decomposition details at different resolution levels.International Journal of Pattern Recognition and Artificial Intelligence,14(6),779-793.
MLA Feng L.,et al."Edge extraction of images by reconstruction using wavelet decomposition details at different resolution levels".International Journal of Pattern Recognition and Artificial Intelligence 14.6(2000):779-793.
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