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:
Jun. 12, 1990
Filed:
May. 03, 1989
Gerard de Haan, Eindhoven, NL;
Philippe A Van Overmeire, Brugge, BE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A simple and reliable interpolation filter can be provided by a median filter 9 to which signals of the pixels x.sub.1, x.sub.2 and x.sub.3 are applied and which can supply incorrect output values at high spatial frequencies perpendicular to a connection line of pixels x.sub.3 and x.sub.4 located diametrically with respect to a pixel (.) to be interpolated, in conjunction with an averaging circuit 25 to which signals of the pixels x.sub.3 and x.sub.4 are applied and which will not be disturbed at the said frequencies, but will cause disturbances at high spatial frequencies in the direction of this connection line x.sub.3 -x.sub.4, at which last-mentioned frequencies the median filter 9 will function correctly again.