Method for reducing coherent row-wise and column-wise fixed...

Details Method for reducing coherent row-wise and column-wise fixed... Method for reducing coherent row-wise and column-wise fixed...

2006-08-01

2006-08-01

Vu, Ngoc-Yen (Department: 2612)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S308000

Reexamination Certificate

active

07084912

ABSTRACT:
A technique for the reduction of coherent row-wise and column-wise fixed-pattern noise in MOS image sensing systems. An array of reference pixels is associated with each row of imaging pixels. The output of each imaging pixel is coupled through a respective imaging column amplifier to a column multiplexer, thereby constituting an imaging pixel signal. In one embodiment, the output of each of a number of reference pixels is coupled to a respective reference column amplifier and from there to a reference multiplexer. The reference multiplexer effects a pseudorandom selection from the outputs of the reference column amplifiers to form a reference signal. The reference signal and the column output are differentially coupled to the remainder of the analog signal path. Synthesis of the reference signal as described above distributes row-wise and column-wise noise randomly, thereby mitigating the effects of coherent noise and enhancing image quality.

REFERENCES:
patent: 4996413 (1991-02-01), McDaniel et al.
patent: 5225696 (1993-07-01), Bahraman
patent: 5654755 (1997-08-01), Hosier
patent: 6130712 (2000-10-01), Miyazaki et al.
patent: 6369853 (2002-04-01), Merrill et al.
patent: 6476864 (2002-11-01), Borg et al.
patent: 6744526 (2004-06-01), McDermott et al.
patent: 357084 (1990-03-01), None

Affiliated with

Also associated with

Rating

Method for reducing coherent row-wise and column-wise fixed... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for reducing coherent row-wise and column-wise fixed..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for reducing coherent row-wise and column-wise fixed... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3695720