Pixel signal non-uniformity correcting device

Details Pixel signal non-uniformity correcting device Pixel signal non-uniformity correcting device

1991-09-27

1994-07-19

Mancuso, Joseph

Television

Camera, system and detail

Combined image signal generator and general image signal...

348241, H04N 5335

Patent

active

053314204

ABSTRACT:
A pixel signal correcting device of a type which corrects pixel signals generated by A/D-converting signals output from a plurality of photoelectric sensor elements arrays is provided. In a calibration mode when the arrays are exposed to uniform illuminating light, the pixel signal for each pixel of the arrays is stored, and a reference pixel signal is determined based on the stored pixel signals. A correction value for each pixel is determined based on a difference between the corresponding stored pixel signal and the reference pixel signal, such that all of the correction values have the same sign. The correction values are stored and used for correcting pixel signals generated during a normal operating mode.

REFERENCES:
patent: 4894721 (1990-01-01), Matsuda
patent: 4920428 (1990-04-01), Lin et al.
patent: 4991127 (1991-02-01), Crookshanks
patent: 5047861 (1991-09-01), Houchin et al.

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