Adaptive control of an electronic imaging camera

Details Adaptive control of an electronic imaging camera Adaptive control of an electronic imaging camera

1991-06-21

1993-02-09

Razavi, Michael T.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 99, 358209, H04N 5238, H04N 718

Patent

active

051856719

ABSTRACT:
A CCD imaging camera is adaptively controlled by: illuminating a reflectance field of view, selectively sensing a desired image field area within the field of view and generating an image signal thereof, reducing low frequency components of the sensed area image signal, generating a contrast signal from the image signal, generating an average or mean signal from a plurality of image contrast signals, comparing the mean signal with a reference signal corresponding to a predetermined contrast maximum value, and thereafter controlling the light level or the range of the camera to the object field.

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patent: 5053878 (1991-10-01), Sang Jo et al.
"Homomorphic Filters", I. Pitas et al, Kluwer Academic Press Publishers, Nonlinear Digital Filters, Principles and Applications, 1990.

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