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US 7,247,836 B2Granted
Method and system for determining motion based on difference image correlation
AssigneeMicron Technology, Inc.
InventorsS. Jeffrey Rosner, Geraint Owen, George M. Clifford, Jr.
Life of this patent
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Abstract
An imager captures successive images of an object. One image is then subtracted from another image to generate difference images. Each difference image is then correlated with itself or with one of the images used to generate the difference image to determine the relative motion between the imager an the object.
Claims11
A method for determining a navigation vector for a device, comprising:
- capturing a first image of an object;
- capturing a second image of the object;
- subtracting the first image from the second image to generate a difference image;
- performing a correlation using the difference image, wherein the difference image is correlated with one of the first image or the second image;
- and
- determining the navigation vector from a result of the correlation, wherein the navigation vector represents relative motion between the device and the object.
3 more elements
A system for determining the relative motion of a device, comprising:
- an imager configured to capture a plurality of images;
- a difference image generator electrically coupled to the imager and configured to generate difference images using pairs of captured images;
- and
- a correlator electrically coupled to the difference image generator and configured to receive each difference image and one of the captured images used to create each difference image and correlate the received captured image with its respective difference image.
1 more element
Dependencies are inferred from the claim text.