Image analysis – Pattern recognition – Feature extraction
Patent
1997-10-08
1999-11-30
Au, Amelia
Image analysis
Pattern recognition
Feature extraction
358462, 382174, 382192, 382291, 382203, 382295, G06K 948
Patent
active
059956615
ABSTRACT:
A bounding box is generated for a scanned image. A vertical edge of the scanned image is detected. A horizontal edge of the scanned image is also detected. The vertical edge is used as a rightmost edge of the bounding box. The horizontal edge is used as a bottom edge of the bounding box. The vertical edge is detected by, for each scan row, detecting when a first pixel in a substep of pixels of the scan row has a grey value which differs from a grey value of a pixel immediately to the right of the first pixel by at least a first predetermined constant. When such a first pixel is found, any edge from a previous row which is continued by the first pixel is detected. A longest edge in any row continued by the first pixel a length of the longest edge is stored. Also stored is an indication of a rightmost pixel of any edge continued by the first pixel. When the length of the longest edge continued by the first pixel exceeds a second predetermined constant, an x-coordinate of the rightmost pixel of any edge continued by the first pixel is stored as a current rightmost edge.
REFERENCES:
patent: 4513442 (1985-04-01), Scherl
patent: 4856075 (1989-08-01), Smith
patent: 4975972 (1990-12-01), Bose et al.
patent: 4996603 (1991-02-01), Kanemitsu
patent: 5033104 (1991-07-01), Amano
patent: 5054091 (1991-10-01), Tanaka et al.
patent: 5202933 (1993-04-01), Bloomberg
patent: 5278919 (1994-01-01), Sugiura et al.
patent: 5317419 (1994-05-01), Koizumi
patent: 5443164 (1995-08-01), Walsh et al.
patent: 5513277 (1996-04-01), Huttenlocher
patent: 5513304 (1996-04-01), Spitz et al.
patent: 5548664 (1996-08-01), Knowlton
patent: 5596655 (1997-01-01), Lopez
Au Amelia
Frederick, II Gilberto
Hewlett--Packard Company
Potts Jerry R.
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