Image analysis – Image transformation or preprocessing – Measuring image properties
Patent
1995-12-11
1999-01-19
Couso, Yon J.
Image analysis
Image transformation or preprocessing
Measuring image properties
382183, 235462, G06K 920
Patent
active
058622675
ABSTRACT:
A method and apparatus locates a periphery or "bounding box" of an image of a symbol located within an image stored by a reader. The symbol preferably has a recognition pattern with an longitudinally extending bar and at least one vertically extending reference bar, such as in the Code One symbology. The method locates the positions of landmark points within the stored image. Landmark points include points at the end of the longitudinally extending bar, points at the corner or root formed between the longitudinally extending bar and the vertically extending bar, and points at the ends of the vertically extending bars. Based on the locations of the landmark points, lines are projected between pairs of the landmark points to determine an amount, if any, of optical distortion to which the image of the symbol suffers. Based on the landmark points, lines projected therebetween and the angles of any distortion, one or more bounding boxes are constructed to determine the periphery of the symbol within the stored image.
REFERENCES:
patent: 4988852 (1991-01-01), Krishnan
patent: 5155343 (1992-10-01), Chandler et al.
patent: 5304787 (1994-04-01), Wang
patent: 5319181 (1994-06-01), Shellhammer et al.
patent: 5324923 (1994-06-01), Cymbalski et al.
patent: 5378881 (1995-01-01), Adachi
patent: 5378883 (1995-01-01), Batterman et al.
patent: 5454054 (1995-09-01), Iizuka
Pavlidis, Theo et al., "Information Encoding with Two-Dimensional Bar Codes," Symbol Technologies, Bohemia, NY, Jun. 1992, pp. 18-28.
Palmer, Roger C., "The Bar Code Book, Reading, Printing, and Specification of Bar Code Symbols," Helmers Publishing, Inc., Peterborough, New Hampshire, 1989, pp. 19-20, 61-62, 90-95, 137-148.
"Uniform Symbology Specification Code One," AIM USA, Pittsburgh, Pennsylvania, Jul. 1994, pp. 1-32.
Couso Yon J.
Intermec IP Corp.
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