Image analysis – Applications – Personnel identification
Reexamination Certificate
2006-06-27
2006-06-27
Mehta, Bhavesh M. (Department: 2625)
Image analysis
Applications
Personnel identification
C382S173000, C382S197000, C382S305000, C178S018010, C434S155000
Reexamination Certificate
active
07068821
ABSTRACT:
An input coordinate sequence is acquired by sampling a handwritten input pattern at predetermined intervals, and a pattern expressed by this input coordinate sequence is approximated by coupling a plurality of line segments to attain line segment conversion. Adjacent angle data φ[i] is generated based on the directions of the respective line segments. At this time, the segment line length along line segments of all the line segments is divided by a predetermined value at equal intervals, and the angles obtained from the directions of the line segments at respective division positions are defined as φ[i]. This φ[i] is compared with a standard pattern (adjacent angle distribution data) prepared in advance to obtain a matching level. In this way, more accurate pattern matching for a handwritten input, which is approximately invariant to affine transformation and can reduce the influence of discretization errors can be implemented.
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Canon Kabushiki Kaisha
Chawan Sheela
Fitzpatrick ,Cella, Harper & Scinto
Mehta Bhavesh M.
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