Automatic focus searching using focal sweep technique
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United States of America Patent
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Dec 20, 2016
Grant Date -
Apr 14, 2016
app pub date -
Oct 12, 2014
filing date -
Oct 12, 2014
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Abstract
An automatic focus searching method for an image capture device is provided. The image capture device has a lens and an image sensor. The method includes: setting an exposure time of the image sensor; computing a focal sweep trajectory of the lens based on at least the exposure time; during the exposure time, moving the lens along the focal sweep trajectory while exposing the image sensor; reading out pixel data of the image sensor that is generated during the exposure time; and applying a filtering operation upon the pixel data to generate an output image.
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