Back light detecting method, back light detecting device and ima

Details Back light detecting method, back light detecting device and ima Back light detecting method, back light detecting device and ima

1997-03-05

1999-10-12

Ho, Tuan

Television

Camera, system and detail

Optics

348363, 348366, H04N 5238

Patent

active

059661755

ABSTRACT:
A back light detecting method, a back light detecting device and an image pick-up camera for detecting a back light state in view of the pick-up state of a subject. Concerning a pixel other than the pixel within the brightness level between two slice levels given from the outside, its brightness level is integrated to distinguish a subject area AR.sub.M from a background area AR.sub.L. A back light state BLS is estimated from the area HIST.sub.M and the brightness level Y.sub.M of the subject area AR.sub.M. Thereby the back light state can be detected more correctly.

REFERENCES:
patent: 5065248 (1991-11-01), Homma
patent: 5486861 (1996-01-01), Miyamoto et al.

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