Imaging apparatus, imaging method, and focus control apparatus
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United States of America Patent
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Aug 23, 2016
Grant Date -
Jul 30, 2015
app pub date -
Dec 2, 2014
filing date -
Jan 27, 2014
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Abstract
A focus control apparatus reduces the degree of out-of-focus of an image of an intense point light source during zooming in contrast-based autofocus control. A zooming lens moves in an optical axis direction to perform magnification change and a focusing lens moves in the optical axis direction to perform focus adjustment and is driven in accordance with a trace curve corresponding to the distance to a subject. A controller evaluates, during the magnification change operation, based on the rate of change in the number of high-luminance pixels at which the number of high-luminance pixels in an output image from the imaging apparatus changes with the zoom magnification, whether or not the focusing lens is driven in accordance with a trace curve corresponding to the distance to the subject before the magnification change operation is performed or a trace curve corresponding to a distance to the subject of infinity.
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