Method of determining the transmission function of a video camer

Details Method of determining the transmission function of a video camer Method of determining the transmission function of a video camer

1989-09-11

1990-08-21

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

364726, H04N 1700

Patent

active

049511416

ABSTRACT:
For determining the transmission function of a video camera, a bar pattern is taken in which the width of the bars is selected to be sufficiently small so that their influence on the amplitude and phase response of the electric pulse that is produced upon scanning of a bar in the camera is negligible; the narrow electric pulses thus produced at the output of the video camera are selected and subjected to Discrete Fourier Transformation.

REFERENCES:
patent: 3952186 (1976-04-01), Speiser et al.
patent: 4760447 (1988-07-01), Koka et al.
patent: 4761685 (1988-08-01), Asaida et al.
patent: 4764974 (1988-08-01), Woods
patent: 4811097 (1989-03-01), Ritter et al.
patent: 4831598 (1989-05-01), Koike et al.
Fischer, W., "Die Fast-Fourier-Transformation fur die Videomesstechnik wiederentdeckt" Fernseh-und Kino-Technik vol. 42, No. 5, 1988, pp. 201-208.

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