Print scanner

Details Print scanner Print scanner

1990-09-06

1993-01-19

Rosenberger, Richard A.

Optics: measuring and testing

By configuration comparison

With comparison to master, desired shape, or reference voltage

356237, 356448, G01B 1100

Patent

active

051810816

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.

REFERENCES:
patent: 4202631 (1980-05-01), Uchiyama et al.
patent: 4270863 (1981-06-01), Trogdon
patent: 4579455 (1986-04-01), Levy et al.
patent: 4691231 (1987-09-01), Fitzmorris et al.

Affiliated with

Also associated with

Rating

Print scanner does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Print scanner, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Print scanner will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-105013