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Proceedings of the IEEE

Issue 7 • Date Jul 1992

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Displaying Results 1 - 12 of 12
  • Segmentation methods for character recognition: from segmentation to document structure analysis

    Publication Year: 1992, Page(s):1079 - 1092
    Cited by:  Papers (78)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    A pattern-oriented segmentation method for optical character recognition that leads to document structure analysis is presented. As a first example, segmentation of handwritten numerals that touch are treated. Connected pattern components are extracted, and spatial interrelations between components are measured and grouped into meaningful character patterns. Stroke shapes are analyzed and a method... View full abstract»

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  • Omnidocument technologies

    Publication Year: 1992, Page(s):1066 - 1078
    Cited by:  Papers (51)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    An optical character recognition (OCR) engine that is omnifont and reasonably robust on individual degraded characters is presented. The weakest link is its handling of characters which are difficult to segment. The engine is divided into four phases: segmentation, image recognition, ambiguity resolution, and document analysis. The features are zonal and reduce the image to a blurred, gray-level r... View full abstract»

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  • Anatomy of a versatile page reader

    Publication Year: 1992, Page(s):1059 - 1065
    Cited by:  Papers (31)  |  Patents (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (660 KB)

    An experimental printed-page reader that is easy to adapt to various languages is described. Changing the target language may involve simultaneous changes in symbol sets, typefaces, sizes of text, page layouts, linguistic contexts, and imaging defects. The strategy has been to isolate the effects of these sources of variation within separate, independent engineering subsystems. In this way, it has... View full abstract»

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  • Historical review of OCR research and development

    Publication Year: 1992, Page(s):1029 - 1058
    Cited by:  Papers (295)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3076 KB)

    Research and development of OCR systems are considered from a historical point of view. The historical development of commercial systems is included. Both template matching and structure analysis approaches to R&D are considered. It is noted that the two approaches are coming closer and tending to merge. Commercial products are divided into three generations, for each of which some representat... View full abstract»

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  • Major components of a complete text reading system

    Publication Year: 1992, Page(s):1133 - 1149
    Cited by:  Papers (54)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1356 KB)

    The document image processes used in a recently developed text reading system are described. The system consists of three major components: document analysis, document understanding, and character segmentation/recognition. The document analysis component extracts lines of text from a page for recognition. The document understanding component extracts logical relationships between the document cons... View full abstract»

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  • High-performance reading machines

    Publication Year: 1992, Page(s):1120 - 1132
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1168 KB)

    The architecture of a reading machine designed to achieve a high rate of correct interpretation of text as well as high speed in performing the interpretation is described. The refinement of the architecture for a specialized reading machine, to find and interpret addresses on a stream of postal letters, is also described. The addresses can be either machine-printed or handwritten. The primary sub... View full abstract»

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  • Automated conversion of engineering drawings to CAD form

    Publication Year: 1992, Page(s):1195 - 1209
    Cited by:  Papers (13)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1444 KB)

    The authors present a discussion of the different aspects and requirements of the CAD conversion problem and describe the general architecture and algorithms of one commercially available CAD conversion system, the GTX 5000. Scanning, vectorization, text recognition, symbol recognition, context processing, and cleanup editing subsystems of the GTX 5000 are described. Several possible alternative a... View full abstract»

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  • At the frontiers of OCR

    Publication Year: 1992, Page(s):1093 - 1100
    Cited by:  Papers (31)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (812 KB)

    It is argued that it is time for a major change of approach to optical character recognition (OCR) research. The traditional approach, focusing on the correct classification of isolated characters, has been exhausted. The demonstration of the superiority of a new classification method under operational conditions requires large experimental facilities and databases beyond the resources of most res... View full abstract»

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  • Off-line cursive word recognition

    Publication Year: 1992, Page(s):1150 - 1161
    Cited by:  Papers (69)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The state of the art in handwriting recognition, especially in cursive word recognition, is surveyed, and some basic notions are reviewed in the field of picture recognition, particularly, line image recognition. The usefulness of `regular' versus `singular' classes of features is stressed. These notions are applied to obtain a graph, G , representing a line image, and also to find an `ax... View full abstract»

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  • Document analysis-from pixels to contents

    Publication Year: 1992, Page(s):1101 - 1119
    Cited by:  Papers (38)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1876 KB)

    The authors present a conceptual framework for solving the task of document analysis, which, in essence, consists in the conversion of the document's pixel representation into an equivalent knowledge network representation holding the document's content and layout. Starting on the pixel level, the formation of elementary geometric objects on which layout analysis as well as the definition of chara... View full abstract»

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  • Computer recognition of unconstrained handwritten numerals

    Publication Year: 1992, Page(s):1162 - 1180
    Cited by:  Papers (208)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1580 KB)

    Four independently, developed expert algorithms for recognizing unconstrained handwritten numerals are presented. All have high recognition rates. Different experimental approaches for incorporating these recognition methods into a more powerful system are also presented. The resulting multiple-expert system proves that the consensus of these methods tends to compensate for individual weaknesses, ... View full abstract»

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  • On-line handwriting recognition

    Publication Year: 1992, Page(s):1181 - 1194
    Cited by:  Papers (36)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1280 KB)

    For large-alphabet languages, like Japanese, handwriting input using an online recognition technique is essential for input accuracy and speed. However, there are serious problems that prevent high recognition accuracy of unconstrained handwriting. First, the thousands of ideographic Japanese characters of Chinese origin (called Kanji) can be written with wide variations in the number and order of... View full abstract»

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North Carolina State University