Optical card reader utilizing area image processing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 26, 1988
Grant Date -
N/A
app pub date -
Apr 4, 1986
filing date -
Apr 4, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical card reader for reading marks made on the face of a preprinted card utilizes a video camera and a memory device to capture and store an image of at least a portion of the card. Positioning indices are printed on the card, and the reader has stored therein information defining possible locations of valid marks relative to the positioning indices. The centroids of the positioning indices on the cards are determined to define the possible locations of valid marks on the cards. The densities and centroids of the marks located in the possible locations are analyzed to determine if a valid mark is present.
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International Classification(s)
Cited Art Landscape
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