IMAGE SENSING APPARATUS AND IMAGE SENSING METHOD
First Claim
1. An image sensing apparatus, comprising:
- an image sensor having two or more different photoelectric conversion characteristics, and adapted to output image signals having the respective photoelectric conversion characteristics individually;
an amplifying section for amplifying the image signals having the respective photoelectric conversion characteristics;
a gain controlling section for controlling a gain of the amplifying section; and
an output section for outputting the image signals having the respective photoelectric conversion characteristics amplified by the amplifying section, whereinthe gain controlling section calculates a gain of the image signals having the respective photoelectric conversion characteristics based on the image signals having the respective photoelectric conversion characteristics to control the gain of the amplifying section by using the calculated gain with respect to each of the photoelectric conversion characteristics.
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Abstract
An image sensing apparatus and an image sensing method of the invention are configured in such a manner that an image sensor having two or more different photoelectric conversion characteristics is used, a gain of image signals having the respective photoelectric conversion characteristics acquired by the image sensor is calculated based on the image signals having the respective photoelectric conversion characteristics, and gain control is performed with respect to each of the photoelectric conversion characteristics, using the calculated gain. This arrangement enables to control the imaging sensitivity without changing the dynamic range.
17 Citations
17 Claims
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1. An image sensing apparatus, comprising:
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an image sensor having two or more different photoelectric conversion characteristics, and adapted to output image signals having the respective photoelectric conversion characteristics individually; an amplifying section for amplifying the image signals having the respective photoelectric conversion characteristics; a gain controlling section for controlling a gain of the amplifying section; and an output section for outputting the image signals having the respective photoelectric conversion characteristics amplified by the amplifying section, wherein the gain controlling section calculates a gain of the image signals having the respective photoelectric conversion characteristics based on the image signals having the respective photoelectric conversion characteristics to control the gain of the amplifying section by using the calculated gain with respect to each of the photoelectric conversion characteristics. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An image sensing method, comprising:
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a step of outputting, from an image sensor having two or more different photoelectric conversion characteristics, image signals having the photoelectric conversion characteristics individually; a step of amplifying the image signals having the respective photoelectric conversion characteristics; a step of controlling a gain in the amplifying step; and a step of outputting the image signals having the respective photoelectric conversion characteristics amplified in the amplifying step, wherein the gain controlling step includes a step of calculating a gain of the image signals having the respective photoelectric conversion characteristics based on the image signals having the respective photoelectric conversion characteristics, and a step of controlling the gain in the amplifying step by using the gain obtained in the gain calculating step with respect to each of the photoelectric conversion characteristics. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification