Image-pickup apparatus with expanded dynamic range capabilities

Details Image-pickup apparatus with expanded dynamic range capabilities Image-pickup apparatus with expanded dynamic range capabilities

2007-11-20

2007-11-20

Vu, Ngoc-Yen (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S296000, C348S364000

Reexamination Certificate

active

10045530

ABSTRACT:
The present invention provides an image-pickup apparatus such as a digital still camera. Herein, prior to actual photographing, pre-photographing is performed with a shutter speed set to a plurality of different values. A signal synthesizing circuit synthesizes the resultant image values to acquire information concerning a dynamic range required to photograph a photographic scene. A signal distribution arithmetic circuit produces a histogram using the acquired information. A signal distribution analyzing circuit analyzes the peak frequencies of the histogram. A shutter timing calculating circuit produces shutter timing signals optimal for actual photographing according to the result of the analysis. An image-pickup device or the like is driven in response to each of the produced shutter timing signals, whereby actual photographing is achieved.

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