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Character segmentation by slices
   
Document Number
US Patent 7471826
Issued Date
December 30, 2008
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Abstract
A method for segmentation of characters in text that segments text into lines, words and slices and determines at least one of fixed pitch and proportional pitch prior to segmentation. The method computes histograms of the lines and defines widths of lobes of the histograms of the lines as the character pitches. In addition, the method further analyzes the character pitches; segments lines into words; computes histograms of the words and aggregating the histograms of the words at predetermined points. Moreover, the method segments the words; slicing them words into an upper slice and lower slice and further segments the upper slice and the lower slice. The results are then combined to provide for both coarse and fine segmentation that enhance the performance of character OCR for documents scanned as at least one of gray-scale images and color images.
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Number of Claims:
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Published
December 30, 2008
Application Number
12/059,309
Filed
March 31, 2008
US Classification
382/171   358/453 358/538 382/164 382/176 382/177
Int'l Classification
G06K   9/00   (20060101)   G06K   9/34   (20060101)   H04N   1/387   (20060101)   H04N   1/46   (20060101)  
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USPTO Field of Search
382/164   382/168   382/170   382/171   382/173   382/174   382/175   382/176   382/177   382/178   382/179   382/180   382/173   382/174   382/175   382/176   382/177   382/178   382/179   382/180   382/200   382/173   382/174   382/175   382/176   382/177   382/178   382/179   382/180   358/453   358/538  
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