Automatic correcting of picture unsteadiness in television film

Details Automatic correcting of picture unsteadiness in television film Automatic correcting of picture unsteadiness in television film

1988-10-24

1989-10-17

Ng, Jin F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358216, H04N 5253

Patent

active

048751022

ABSTRACT:
For detecting picture unsteadiness in television pictures obtained from a film scanner in which the film moves continuously, the sprocket holes and the picture boundaries on the film and additional reference marks that may be provided on the film outside of the picture boundaries were scanned by an oblique sensor to produce pulse signals indicating both vertical and horizontal deviations. A reference pattern is produced by running the film through the scanner so equipped and thereafter when the film is scanned for television transmission the reference pattern is compared with the contemporary pattern to provide correction signals for steadying the television pictures. Normally only one form of measurement will be used, but the others are available for automatic or prompt manual substitution if the pulse signals in use become unreliable during any particular portion of the film scanning.

REFERENCES:
patent: 3806643 (1974-04-01), Russell
patent: 4054918 (1977-10-01), Kamogawa et al.
patent: 4104680 (1978-08-01), Holland
patent: 4236183 (1980-11-01), Howe
patent: 4255764 (1981-03-01), Howe
patent: 4296438 (1981-10-01), Stemme et al.
"New Investigations on Picture Steadiness of Motion Pictures in Projection"--Journal of the SMPTE, vol. 77,1/68.
"Challenges to the Concept of Cancellation", Journal of the SMPTE, Dec. 1981, Roland J. Zavada.
"Image Unsteadiness in 16 mm Film for Television"--Journal of the SMPTE, vol. 80, Oct. 1971.

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