Segmentation of document images

Philip J. Bones; Todd C. Griffin; Chris M. Carey-Smith

doi:10.1117/12.19950

1 August 1990 Segmentation of document images

Philip J. Bones, Todd C. Griffin, Chris M. Carey-Smith

Proceedings Volume 1258, Image Communications and Workstations; (1990) https://doi.org/10.1117/12.19950
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

Document scanning is now an accepted part of office procedure, allowing the incorporation of digitized images into new documents and the conversion of scanned print into ASCII by optical character recognition ( OCR). Often document pages contain more than one form of information - textual, graphical and/or pictorial. Segmentation of document images into these three categories is feasible with the aid of image processing. Projections of the thresholded document images in conjunction with autocorrelation are used to check text alignment. Then the edge shifting properties of the rank filter are used to coalesce image regions containing text into solid near-rectangular blocks. Pyramidal reduction is combined with the filtering to ease the computational burden. Horizontal and vertical projections are used to segment whole pages recursively into homogeneous blocks whose properties are then analysed. Applications forseen for the image segmentation include modified facsimile systems, achievement of artifact-free OCR and conversion of document images into files with separate formats for text, graphics and pictures.

Citation Download Citation

Philip J. Bones, Todd C. Griffin, and Chris M. Carey-Smith "Segmentation of document images", Proc. SPIE 1258, Image Communications and Workstations, (1 August 1990); https://doi.org/10.1117/12.19950

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