The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 09, 1988
Filed:
Dec. 03, 1984
Applicant:
Inventors:
Jean A Van Daele, Mechlin, BE;
Patrick M Pandelaers, Brussels, BE;
Assignee:
Agfa-Gevaert, N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358282 ; 358283 ; 358298 ;
Abstract
A signal-processing device for transforming a digital image signal, that has been obtained by sampling and digitization of a video signal obtained by line-wise scanning of an original, to a binary image signal wherein zero points of the two-dimensional second difference of the digital video signal are determined in order to detect contrast transitions in the original. Unwanted noise components in the video signal are eliminated by masking the second-difference signal.