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:
May. 02, 1989
Filed:
Dec. 19, 1986
Bernd Ehlers, Elmshorn, DE;
Gerhard Renelt, Hamburg, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
A first pseudo-halftone picture is converted to a second pseudo-halftone picture of reduced resolution in the ration m:n by dividing the first picture into contiguous picture fields each having i.multidot.n lines and j.multidot.n columns of picture elements in contiguous square subfields each having n.sup.2 picture elements. m.sup.2 elements are selected from each subfield in accordance with a selection sequence which depends on the position of the subfield in the picture field, the elements being selected from all i.multidot.n lines and all j.multidot.n columns of each picture field, the selection sequence being the same for each picture field.