Print scanner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 19, 1993
Grant Date -
N/A
app pub date -
Sep 6, 1990
filing date -
Sep 6, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A print scanner for detecting defects in the label of a compact disc or the like supported on a carrier moved through a label printing station into a substantially light-tight housing in which the disc is illuminated with diffuse light through a mask so that a video camera in the housing sees only the label area. A reference image derived from a multiplicity of video frames and a sample image derived from a plurality of video frames are subtracted each from the other, two histograms are computed from the subtraction results and respective figures of merit for missing ink and added ink are calculated from the histograms.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully