Object-of-interest image capture
AssigneeMotorola, Inc.
InventorsKing F. Lee, Allyson J. Beuhler, Bei Tang
Life of this patent
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Abstract
A method and apparatus for object-of-interest image capture accomplishes the functions of capturing (120) a current image, determining (125) an object region of the object-of-interest in the current image, calculating (130) a contrast measurement of the object region, and identifying (135) the current image as having an optimized object region when an iteration measure meets a criterion. The current image is captured using a local exposure value determined from luminance readings of pixels within an object region of an object-of-interest of a previous image.
Claims17
A method for object-of-interest image capture, comprising:
- capturing a current image using a local exposure value determined from luminance readings of pixels within an object region of an object-of-interest of a previous image;
- determining an object region of the object-of-interest in the current image;
- calculating a contrast measurement of the object region;
- and
- identifying the current image as having an optimized object region when an iteration measure meets a criterion wherein the local exposure value is determined from a sum of absolute differences (SAD) of luminance readings of adjacent pixels within the object region.
A means for object-of-interest image capture, comprising:
- a means for capturing a current image;
- a means for setting an exposure value that determines a local exposure value from a local luminance reading of pixels within an object region of an object-of-interest of a previous image;
- a means for local luminance determination that generates the local luminance reading;
- a means for locating the object region of the object-of-interest in the current image;
- and
- a means for calculating a contrast measurement of the object region and identifying the current image as having an optimized object region when an iteration measure meets a criterion wherein the local exposure value is determined from a sum of absolute differences (SAD) of luminance readings of adjacent pixels within the object region.
An electronic device for object-of-interest image capture, comprising:
- an electronic device for capturing a current image;
- and
- a processing function that includes
- an exposure value setting function that determines a local exposure value from a local luminance reading of pixels within an object region of an object-of-interest of a previous image;
- a local luminance determination function that generates the local luminance reading;
- a locating function that locates the object region of the object-of-interest in the current image;
- and
- a calculation function that calculates a contrast measurement of the object region and identifying the current image as having an optimized object region when an iteration measure meets a criterion wherein the local exposure value is determined from a sum of absolute differences (SAD) of luminance readings of adjacent pixels within the object region.
Dependencies are inferred from the claim text.