Method and system for using an image based autofocus algorithm
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United States of America Patent
Stats
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Mar 6, 2007
Grant Date -
Jan 29, 2004
app pub date -
Jul 25, 2002
filing date -
Jul 25, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image based autofocus method and system that includes receiving image data; monitoring and analyzing the contrast between different portions of the image data in determining the location of a target wherein the different portions of the image data contain at least one type of image pixel information and the monitoring and analyzing are performed using at least one kernel filter to determine a focus measure; adjusting a focus mechanism that is focusing on the image data; observing an image quality of the image data that has been focused; and continuously outputting an image to support an image processing frame rate and adjusting the focus mechanism to obtain an improved focus image by adjusting the focus mechanism in a positive direction, a negative direction or a zero (0) direction based upon effectuating a desired change in the observed image quality of the image data.
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