METHOD AND APPARATUS FOR LOW COST MOTION DETECTION
First Claim
Patent Images
1. A method of detecting motion of an object in a first image, said method comprising:
- determining weighted row and column averages of a reference image;
determining weighted row and column averages of the first image; and
detecting motion of the object based on the determined weighted column and row averages of the reference image and the first image.
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Abstract
A non-frame-based motion detection method and apparatus for imagers requires only a few line buffers and little computation. The non-frame-based, low cost motion detection method and apparatus are well suited for “system-a-chip” (SOC) imager implementations.
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Citations
31 Claims
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1. A method of detecting motion of an object in a first image, said method comprising:
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determining weighted row and column averages of a reference image; determining weighted row and column averages of the first image; and detecting motion of the object based on the determined weighted column and row averages of the reference image and the first image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A motion detection circuit comprising:
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a plurality of line buffers, a first line buffer for storing a weighted row average of a reference image, a second line buffer for storing a weighed row average of a first image, a third line buffer for storing a weighted column average of the reference image and a fourth line buffer for storing a weighted column average of the first image; and logic for detecting motion of an object in the first image by computing and storing the weighted row and column averages of the reference and first images and detecting the motion of the object based on the determined weighted column and row averages of the reference and first images. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An imager comprising:
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an image sensor for capturing a reference image and a first image and for outputting digital reference image data and first image data; and a motion detection circuit connected to input the reference image data and the first image data, said circuit comprising; a plurality of line buffers, a first line buffer for storing a weighted row average of the reference image, a second line buffer for storing a weighed row average of the first image, a third line buffer for storing a weighted column average of the reference image and a fourth line buffer for storing a weighted column average of the first image; and a processor programmed to perform motion of an object in the first image, said processor performing a first process to compute and store the weighted row average of the reference image, a second process to compute and store the weighted column average of the reference image, a third process to compute and store the weighted row average of the first image, a fourth process to compute and store the weighted column average of the first image, and a fifth process for detecting the motion of the object based on the determined weighted column and row averages of the reference and first images. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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Specification