Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1995-04-21
1996-08-20
Horabik, Michael
Television
Camera, system and detail
Combined image signal generator and general image signal...
348243, H04N 964, H04N 5217
Patent
active
055483321
ABSTRACT:
A technique is disclosed for correcting black shading errors in a video camera. The technique involves calculating a horizontal correction waveform as a function of the average pixel values for the columns of a field. Next, a vertical correction waveform is calculated as a function of the average pixel values for the rows of a field. Then, calculation of a diagonal correction waveform as a function of the average pixel values along predetermined diagonals is performed. Finally, an input video signal representing real images is combined with the correction waveforms to produce a video output signal having substantially reduced black shading errors. Correction waveforms can be determined in any order.
REFERENCES:
patent: 4285004 (1981-08-01), Morrison et al.
patent: 4599640 (1986-07-01), Dischert
patent: 4663666 (1987-05-01), Bloom
patent: 4731652 (1988-03-01), Yamanaka
patent: 4970598 (1990-11-01), Vogel
patent: 5047861 (1991-09-01), Houchin et al.
patent: 5134474 (1992-07-01), Harafusa et al.
patent: 5272536 (1993-12-01), Sudo et al.
patent: 5283655 (1994-02-01), Usami
J. Freund, R. Walpole, Mathematical Statistics Prentice-Hall, Inc. pp. 254,255,138,139.
Dischert Lee R.
Topper Robert J.
Day Michael
Horabik Michael
Panasonic Technologies Inc.
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