Video camera apparatus capable of simply extracting brightness information used in auto-iris control
AssigneeSony Corporation
InventorJun Kitamura
Life of this patent
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Abstract
In a video camera apparatus, a proper iris control operation can be carried out based upon pseudo-luminance information, and the iris control operation and also the focus control operation can be independently performed. The R, G, B pixel data which are outputted from a CCD image sensor and are acquired before being inputted to an image signal processing unit are multiplied with each other so as to produce the pseudo-luminance information instead of the luminance signal. The iris control operation is carried out based on this pseudo-luminance information. Also, the respective R, G, B pixel data acquired before being inputted to a white balance amplifier are multiplied with each other to produce the pseudo-luminance information.
Claims8
A video camera apparatus comprising:
- a solid-state imaging element having a plurality of pixels arranged in a matrix form, a color filter being arranged with respect to each of said pixels;
- image signal processing means for producing image information constructed of luminance information and color information based on the respective pixel information outputted from said solid-state imaging element;
- averaging means for averaging a predetermined amount of the respective pixel information;
- pseudo-luminance information producing means for multiplying the averaged pixel information which is outputted from said solid-state imaging element and is acquired before being inputted into said image signal processing means to thereby produce a pseudo-luminance information signal;
- and
- iris control means for performing an iris control based on said pseudo-luminance information signal.
Dependencies are inferred from the claim text.