Method of and apparatus for generating a depth map utilized in autofocusing
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United States of America Patent
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May 4, 2010
Grant Date -
Dec 27, 2007
app pub date -
Jun 22, 2006
filing date -
Jun 22, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A method of and an apparatus for determining a depth map utilizing a movable lens and an image sensor are described herein. The depth information is acquired by moving the lens a short distance and acquiring multiple images with different blur quantities. An improved method of simulating gaussian blur and an approximation equation that relates a known gaussian blur quantity to a known pillbox quantity are used in conjunction with a non-linear blur difference equation. The blur quantity difference is able to be calculated and then used to determine the depth map. Many applications are possible using the method and system described herein, such as autofocusing, surveillance, robot/computer vision, autonomous vehicle navigation, multi-dimensional imaging and data compression.
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