Device for automatically controlling the transfer function of a

Details Device for automatically controlling the transfer function of a Device for automatically controlling the transfer function of a

1980-05-12

1982-06-29

Smith, Jerry

Boots, shoes, and leggings

358166, 364553, H04N 300, G06F 1536

Patent

active

043375146

ABSTRACT:
The device comprises a variable-characteristic nonlinear four-terminal network having one input for receiving a video signal V.sub.e and eight inputs for controlling transfer parameters. Statistical analysis of the amplitude of the signal V.sub.e permits acquisition of the luminance distribution function of said signal. On the basis of this distribution function, computing means determine the values of the transfer parameters to be applied to the control inputs of the four-terminal network in order to deliver at the output of the network a video signal V.sub.s which extends over the entire luminance scale and has the desired distribution for satisfying optimum conditions of vision.

REFERENCES:
patent: 3626168 (1971-12-01), Norsworthy
patent: 3708693 (1973-01-01), Ferrier et al.
patent: 3979555 (1976-09-01), Opittek et al.
patent: 3983320 (1976-09-01), Ketcham et al.
patent: 3996421 (1976-12-01), Pruznick et al.
patent: 4214271 (1980-07-01), Jones et al.

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