Method and device to obtain an element of information on depth i

Details Method and device to obtain an element of information on depth i Method and device to obtain an element of information on depth i

1993-12-13

1996-07-09

Greening, Wendy R.

Television

Camera, system and detail

Optics

348207, H04N 5238

Patent

active

055349242

ABSTRACT:
A method and an apparatus is disclosed for extracting from a single shot, two pictures of an illuminated scene having a foreground zone and a background zone respectively. The first picture has a depth of field which is greater than the second picture. Subsequently the high frequency components are extracted from each of the pictures in order to reflect characteristics of each of the pictures which have the greatest amount of contrast or sharpness. The two high frequency signals are compared in order to obtain a depth of field signal based upon the differences between the two signals.

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patent: 4030817 (1977-06-01), Westell
patent: 4404594 (1983-09-01), Hannan
patent: 4798437 (1989-01-01), Rediker
patent: 5023724 (1991-06-01), Ferren
patent: 5039214 (1991-08-01), Nagata et al.
patent: 5132802 (1992-07-01), Osthues et al.
patent: 5157499 (1992-10-01), Oguma et al.
patent: 5365597 (1994-11-01), Holeua

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