Detection of barcodes in binary images with arbitrary orientation
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United States of America Patent
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-
Jun 9, 1992
Grant Date -
N/A
app pub date -
Aug 10, 1990
filing date -
Aug 10, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The location and orientation of a barcode block is determined by first producing an image of the document that excludes the barcode block and producing a second image wherein the spaces in the barcode block have been deleted thereby providing a solid rectangular block. The two images are subtracted to reject large background clutter while displaying with certainty the full image of the barcode block. Thereafter, down-sampling occurs to remove small clutter and other non-barcode objects while locating the centroid of each barcode block. The image containing the centroid is up-scaled and used to calculate the position of the barcode block in the original document for use by a barcode reader.
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