Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-11-12
1993-11-23
Powell, Mark R.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358166, 378 99, H04N 520
Patent
active
052649326
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.
REFERENCES:
patent: 4825297 (1989-04-01), Fuchsberger et al.
patent: 4860104 (1989-08-01), Katsuyama
patent: 4979043 (1990-12-01), Suzuki et al.
patent: 5089890 (1992-02-01), Takayama
patent: 5091925 (1992-02-01), Haendle et al.
Haendle Joerg
Marhoff Paul
Ritter Manfred
Powell Mark R.
Siemens Aktiengesellschaft
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