Patent · US Expired

Video processing system having a filter circuit with a spatial-frequency high-pass filter characteristic

US5264932A · kind A · utility

2Cited by

5References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joerg Haendle · Erlangen, DE
Manfred Ritter · Forchheim, DE
Paul Marhoff · Erlangen, DE

Key dates

Filing date	Nov 12, 1992
Grant date	Nov 23, 1993
Priority date	—
Expiry date	Nov 12, 2012

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/32
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A video processing system, of the type used for portraying x-ray images, has a filter circuit with a spatial-frequency high-pass filter characteristic, the filter circuit including an amplitude-dependent separating filter having outputs to which respective spatial-frequency high-pass filters having different limit frequencies and/or having different kernel sizes are connected. The spatial-frequency high-pass filters are connected to the output of the overall filter circuit through an addition unit, so that the respective outputs of the spatial-frequency high-pass filters can be combined in different amounts to form the output of the overall filter circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.