Device for correcting the faults of a sequence of images analyze

Details Device for correcting the faults of a sequence of images analyze Device for correcting the faults of a sequence of images analyze

1990-09-21

1992-06-02

Fields, Carolyn E.

Radiant energy

Infrared-to-visible imaging

Including detector array

2502521, 358113, 35821316, H04N 533

Patent

active

051189437

ABSTRACT:
A device for correcting the faults of a sequence of images analyzed by an integrating matrix infrared sensor has a first part that determines a correction signal that is variable as a function of the temperature of the background of the images, equal to the product of a value representing the mean luminance of an image preceding the image undergoing correction, and a signal representing approximately the sensitivity of each cell of the sensor, constituted by the values of a video signal corresponding to an image analyzed in the course of a pre-calibration period; and a second part to determine a second correction signal, in storing the values of the first corrected video signal during a calibration period. An application of this device could be for the infrared cameras used in weapons systems.

REFERENCES:
patent: 3895182 (1975-07-01), Trilling
patent: 4423437 (1983-12-01), Beck et al.
patent: 4560286 (1985-12-01), Wickersheim
patent: 4605851 (1986-08-01), Ometz et al.
patent: 4628352 (1986-12-01), Boue
patent: 4703442 (1987-10-01), Levine
Patent Abstracts of Japan, vol. 13, No. 316 (P-900)(3664) Jul. 18, 1989; & JP-A-10 881216 (Fujitsu) Apr. 3, 1989.
Patent Abstracts of Japan, vol. 6, No. 229 (P-155) Nov. 16, 1982; & JP-A-57 132 031 (Fujitsu) Aug. 16, 1982.
Patent Abstracts of Japan, vol. 10, No. 152 (P-462) Jun. 3, 1986; & JP-A-61 004 932 (Nippon Avionics K.K.) Jan. 10, 1986.

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