Method and apparatus for subject image tracking in high definiti

Details Method and apparatus for subject image tracking in high definiti Method and apparatus for subject image tracking in high definiti

1992-11-20

1995-02-07

Groody, James J.

Television

Special applications

Film, disc or card scanning

348104, H04N 911

Patent

active

053879295

ABSTRACT:
A subject image being electronically transferred from a first medium to a second medium is accomplished through tone scale tracking. Three monochromatic channels representing the subject image are generated from the first medium. In a preferred embodiment, an image processing system provides color correction for each channel by compensating for film and video characteristics that cause a degradation of color from the original subject image. Calibration of the system is provided by means for an operator to specify tone densities for the second medium that correlate to signal levels derived from the first medium for each channel. The image processing system tracks the tone densities calibrated to provide enhanced film masking. The image processing system also performs characteristic curve processing in accordance with a Hurter-Driffield (HD) curve. A characteristic curve interface is provided allowing an operator to place the subject image on the characteristic curve so that the image processing system tracks the location of the subject image on the curve.

REFERENCES:
patent: 3853564 (1974-12-01), Baker
patent: 3885971 (1975-05-01), Kato
patent: 4290692 (1981-09-01), Svatek
patent: 5053866 (1991-10-01), Johnson
patent: 5057931 (1991-10-01), Numakura et al.
patent: 5060061 (1991-10-01), Shishido et al.
patent: 5081529 (1992-01-01), Collete
patent: 5255083 (1993-10-01), Capitant

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