Apparatus for positioning a line segment, method of position com

Details Apparatus for positioning a line segment, method of position com Apparatus for positioning a line segment, method of position com

1997-11-19

2000-07-25

Mancuso, Joseph

Image analysis

Image segmentation

382291, 382309, G06K 934, G06K 936

Patent

active

060945044

ABSTRACT:
An apparatus for tracing the locations of a line segment moving across a planar tablet is disclosed in the present invention, which includes a microprocessor, a positioning coil driving circuit, a plurality of positioning coils, a planar sampling circuit, a coordinate acquisition circuit and a counting circuit for the purpose of determining the location of a line segment relative to the planar tablet at a given time instant. A location of the line segment is determined by energizing a pair of positioning coils, each representing an end of the line segment, alternately and thereby achieving positional coordinates of these two ends. Repeating of such positioning operation results in a trace of the trajectory of movement of the line segment. A simple and effective position compensation method for offsetting the positioning error when locations of a physically installed or logically perceptible line object, instead of the line segment pointed by the two positioning coils, are to be traced. This invention also brings forth a new type of image scanning system which, during a scanning operation, captures visually perceptible information of the scanned object together with the corresponding spatial information and thereby representing the scanned object as a two-dimensional computer image wherein each image pixel is stored in a memory location uniquely determined by a positional coordinate relative to the planar tablet.

REFERENCES:
patent: 4677683 (1987-06-01), Pferd, III et al.
patent: 5026953 (1991-06-01), Hsu
patent: 5854449 (1998-12-01), Adkins
patent: 5867152 (1999-02-01), Sextro
patent: 5930406 (1999-07-01), Itsuzaki et al.

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