Imaging apparatus and method with focus detection and adjustment

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United States of America Patent

PATENT NO 9137436
APP PUB NO 20140204241A1
SERIAL NO

14158679

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Abstract

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An imaging apparatus performs a focus detecting operation with an image sensor including a photoelectric conversion portion that has a pupil-dividing function. The imaging apparatus increases a line addition number according to a target exposure value corresponding to a pixel dynamic range that is variable depending on an exposure setting value. Thus, the imaging apparatus can reduce the amount of noise and can suppress the dispersion of focus detection result. Further, the imaging apparatus changes the line addition number according to a lens diaphragm aperture size, a defocus amount, or a pixel signal reading mode. Thus, the imaging apparatus can secure the resolution in the vertical direction and can prevent the detection accuracy from deteriorating even in a case where a photographic subject is obliquely positioned in a focus detection area.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ohara, Naoyuki Machida, JP 13 454

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