Method of correcting faults in an opto-mechanical scanning camer

Details Method of correcting faults in an opto-mechanical scanning camer Method of correcting faults in an opto-mechanical scanning camer

1994-07-14

2000-11-14

Ho, Tuan

Television

Camera, system and detail

Optics

348216, 250332, H04N 5232

Patent

active

061477109

ABSTRACT:
An image output by a camera can contain a fault such that the signal output by the camera is not constant for a uniform background. To correct this fault, the method involves memorizing, as a correction image, a destructured image of the scene to be observed; this destructured image is generated by calculating the means of the signals obtained when the selected scene is observed while the camera settings are simultaneously modified inconsistently; the correction image is then subtracted from the image formed by the signals output by the detector during real observation of the scene selected with correct camera settings. Application to all scanning cameras.

REFERENCES:
patent: 4155096 (1979-05-01), Thomas et al.
patent: 4298887 (1981-11-01), Rode
patent: 4698685 (1987-10-01), Beaverson
patent: 5134474 (1992-07-01), Hanafusa et al.
patent: 5231443 (1993-07-01), Subbarao

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