Real time binarization of gray images
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United States of America Patent
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May 18, 2004
Grant Date -
N/A
app pub date -
May 30, 2000
filing date -
Nov 1, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A binarization method for gray address images which combines high quality and high speed. The method is designed specifically for efficient software implementation. Two binarization approaches, localized background thresholds and Laplacian edge enhancement, are combined into a process to enhance the strengths of the two methods and eliminate their weaknesses. The image is divided into tiles, making binarization decisions for each tile. Tile decisions are modified based on adjacent tile decisions and then the tiles are binarized. Binarization of pixels is performed by performing background thresholding and edge detection thresholding. Only pixels exceeding both thresholds are selected as 'on'.
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