HARDWARE GENERATION OF IMAGE DESCRIPTORS
First Claim
Patent Images
1. An electronic device, comprising:
- an image sensor that captures images; and
interest point and descriptor circuitry, comprising;
first circuitry for downscaling the images by a first octave; and
second circuitry for downscaling the images by a second octave, wherein the second circuitry is reused for downscaling the images by at least a third octave, and wherein the interest point and descriptor circuitry is configured to extract interest points and descriptors for the images as the images are received from the image sensor.
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Abstract
Interest point and description circuitry is provided for tracking an object through multiple image frames. Interest point and description circuitry may be provided on an integrated circuit in an imaging device. Interest points and descriptors may be calculated at frame rate. A feature detection function may be applied to scaled images to extract interest points. Descriptors may be rotating circular gradient-histogram descriptors. Descriptors may have one or two rings, each having equal area. Descriptors may have discrete rotational positions and discrete scaling. Gradient-histograms may be calculated for the descriptors using angular, radial, and directional weighting components.
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Citations
20 Claims
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1. An electronic device, comprising:
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an image sensor that captures images; and interest point and descriptor circuitry, comprising; first circuitry for downscaling the images by a first octave; and second circuitry for downscaling the images by a second octave, wherein the second circuitry is reused for downscaling the images by at least a third octave, and wherein the interest point and descriptor circuitry is configured to extract interest points and descriptors for the images as the images are received from the image sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for extracting interest points and descriptors from images on an image processing integrated circuit, comprising:
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receiving, at the image processing integrated circuit, a plurality of images of an object, wherein the plurality of images are received at a frame rate; extracting interest points on the object for the plurality of images, wherein the extracting of interesting points is performed by the image processing integrated circuit at frame rate; extracting descriptors for the interest points, wherein the extracting of descriptors is performed by the image processing integrated circuit at frame rate, wherein the descriptors comprise rotating gradient-histogram descriptors having discrete rotational positions and discrete scaling. - View Dependent Claims (9, 10, 11, 12, 13)
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14. Circuitry on an integrated circuit, comprising:
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feature extraction circuitry that extracts interest points from each of a plurality of images; and descriptor extraction circuitry that is configured to construct descriptors associated with each of the interest points, wherein the descriptors comprise rotating gradient-histogram descriptors having discrete rotational positions. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification