Simultaneous amplitude sequency apparatus

Details Simultaneous amplitude sequency apparatus Simultaneous amplitude sequency apparatus

1982-03-12

1984-02-14

Safourek, Benedict V.

Facsimile and static presentation processing

Facsimile

Recording apparatus

364726, H04N 141

Patent

active

044320191

ABSTRACT:
A simultaneous amplitude sequency apparatus utilizing a scanner/modulator unit to scan an image and provide an analog data signal, which is digitized in an A/D converter. The digital data signal is transformed by a Fourier transform unit into a frequency signal. A digital filter which allows only the high frequency terms to pass, preserves the sharp edges of the image that are required in the analysis of the imagery. The correlation portion of the system insures that the applicable amplitude data points are synchronized with the corresponding points in the sequency signal. Thus, compression of the imagery signal is achieved while insuring that the important information is preserved (i.e., sharp amplitude time varying changes). The high order of imagery compression which is in the range of 20/1 insures that the important data is preserved.

REFERENCES:
patent: 4164788 (1979-08-01), Jain
patent: 4179709 (1979-12-01), Workman
patent: 4293920 (1981-10-01), Merola
patent: 4398217 (1983-08-01), Peters

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