Method and apparatus for electronically stabilizing digital images
First Claim
1. A method of compensating for motion during an exposure time in a digital imaging system, comprising dividing said exposure time into a plurality of shorter time intervals;
- sensing image data for each of said time intervals, the image data corresponding to individual images;
determining a lateral offset between successive images; and
integrating said images to compensate for said offset.
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Abstract
An electronic image stabilizer in a digital camera compensates for camera motion-induced blurriness by segmenting exposure times into multiple shorter exposure times and summing the individual pixels from successive frames after applying an appropriate motion correction. Motion is detected by computing the correlation function between successive images, and compensation is applied by maximizing the correlation function. This avoids the need for mechanical stabilization devices in order to detect or correct the motion as is done in prior art. This method further enables the detection of moving objects in a still background, and correction of blurriness images due to such motion.
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Citations
20 Claims
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1. A method of compensating for motion during an exposure time in a digital imaging system, comprising
dividing said exposure time into a plurality of shorter time intervals; -
sensing image data for each of said time intervals, the image data corresponding to individual images;
determining a lateral offset between successive images; and
integrating said images to compensate for said offset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for compensating for motion during an exposure time in a digital imaging system, the apparatus comprising:
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an image sensor for producing image data corresponding to a scene; and
a processor for controlling the sensor to produce multiple images during said exposure time, the processor having a control program that determines an offset between successive images due to said motion, and integrates the successive images to compensate for the offset. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification