Segmentation of a postal object digital image by Hough transform
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United States of America Patent
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Sep 19, 2006
Grant Date -
Jan 8, 2004
app pub date -
Jun 19, 2001
filing date -
Jun 27, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to segment a digital image of a postal packet in order to read a postal address (AP) automatically on said packet, the method consists: in subdividing (20) the image into image blocks of identical size; in applying (30) processing based on a Hough transform to each image block in order to identify in the image block in question a privileged direction for the distribution of image points in the block under consideration; in grouping together (40) contiguous image blocks within the image having a common privileged direction in order to define (50) a rectangular zone of interest (ZI) containing the group of said contiguous blocks having a common privileged direction in such a manner that said rectangular zone of interest has a longitudinal edge parallel to said common privileged direction; and in applying the automatic address-recognition algorithm to said zone of interest in the image in order to read a postal address automatically.
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