Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1982-09-07
1984-07-31
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358 36, 358167, 364414, 378 99, H04N 718
Patent
active
044633750
ABSTRACT:
In a multiple-measurement system, a weighted sum of the measurements is used to provide a selective image. An additional weighted sum is used to provide an increased signal-to-noise ratio of some desired parameter of the image. The high frequency components of the increased signal-to-noise ratio image are combined with the low frequency components of the selective image to provide a selective image with improved signal-to-noise ratio. The combining operation can utilize the ratios of the derivatives in each signal to provide the correct amount of high frequency signal at each transition.
REFERENCES:
patent: 2833851 (1958-05-01), Loughlin
patent: 4029963 (1977-06-01), Alverez
patent: 4064530 (1977-12-01), Kaiser
patent: 4181917 (1980-01-01), Richman
patent: 4229764 (1980-10-01), Panos
patent: 4367490 (1983-01-01), Riederer
patent: 4409615 (1983-10-01), McMann
Britton Howard W.
The Board of Trustees of the Leland Standford Junior University
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