Filter working on image digital signals for video appliances

摘要

A filter acting on digital image signals for apparatus of the video type comprises: at least first and second circuit means (2) and (3) adapted to elect an image edge, each said circuit means comprising at least one inferential circuit (C1 and C2) operating on a fuzzy logic, which has at least first and second input terminals and at least one output terminal, and at least first and second comparison elements (S1,S2,S3,S4) each having first and second input terminals and at least one output terminal, said input terminals being intended for receiving discrete digital signals of an image. The output terminals of the first and second comparison elements (S1 and S2) in the first circuit means (2) are respectively connected to the first and second input terminals of the inferential circuit included to said first circuit means, and the output terminals of the first and second comparison elements (S3 and S4) in the second circuit means (3) are respectively connected to the first and second input terminals of the inferential circuit included to said second circuit means.