Registers – Coded record sensors – Particular sensor structure
Patent
1994-12-27
1997-02-04
Pitts, Harold
Registers
Coded record sensors
Particular sensor structure
235454, 235470, G06K 710
Patent
active
056001177
ABSTRACT:
A mark sheet reading apparatus is disclosed which can correct the coordinates of a binary signal read from a mark sheet when the mark sheet is in skew with an angle. A mark sheet having a plurality of marking areas arranged in a matrix of rows and columns thereon additionally has a reference row mark in the form of a continuous straight line provided in parallel to a row of the matrix and extending over a length covering the overall length of the row. The mark sheet reading apparatus comprises a reference row mark detection section for discriminating a successive condition of dots from among data read by an image sensor to detect the reference row mark of the mark sheet, a skew detection section for detecting an inclination rate of the reference row mark thus detected, and a skew correction section for correcting coordinates of binary data read by the image sensor in accordance with the inclination rate of the thus detected reference row mark.
REFERENCES:
patent: 3852573 (1974-12-01), Dolch
patent: 4153895 (1979-05-01), Weishbrod et al.
patent: 4774400 (1988-09-01), Kimura
patent: 4937439 (1990-06-01), Wanninger
patent: 5004896 (1991-04-01), Serrell et al.
patent: 5093653 (1992-03-01), Ikehira
patent: 5101447 (1992-03-01), Sokoloff
patent: 5229589 (1993-07-01), Schneider
patent: 5245166 (1993-09-01), Shepard
patent: 5416308 (1995-05-01), Hood et al.
NEC Corporation
Pitts Harold
LandOfFree
Mark sheet reading apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mark sheet reading apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mark sheet reading apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-681341