Object detection
First Claim
Patent Images
1. A method for detecting an object in an area, comprising:
- capturing a reference image of the area without the object present, wherein the area includes an intentionally patterned background with both light areas and dark areas, wherein the light areas and dark areas have an intended interrelationship;
capturing a live image; and
determining if the object is present by comparing the reference image and the live image.
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Abstract
A method for object detection that utilizes a patterned background. Patterned backgrounds are chosen such that each reference image analyzed will have both light and dark pixels. The method calculates the difference between the expected value for the light pixels and the expected value of the dark pixels in the reference image. This difference is used to chose a threshold value. The difference in expected values for the corresponding pixels in a live image is calculated and compared to the threshold value. If the difference in expected values of the live image are less than the threshold value, object detection is indicated.
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Citations
25 Claims
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1. A method for detecting an object in an area, comprising:
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capturing a reference image of the area without the object present, wherein the area includes an intentionally patterned background with both light areas and dark areas, wherein the light areas and dark areas have an intended interrelationship; capturing a live image; and determining if the object is present by comparing the reference image and the live image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for detecting an object in an area, comprising:
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providing a patterned background in the area, wherein the patterned background includes both light areas and dark areas with an intended interrelationship; capturing a reference image of the area without the object present; capturing a live image of the area; and determining if the object is present in the area by comparing the reference image and the live image. - View Dependent Claims (15, 16)
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17. An object detection system, comprising:
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a patterned background fixed to an area, wherein the patterned background includes both light areas and dark areas with an intended interrelationship; an image capture device for capturing a reference image of the area without the object present, and a live image of the area; and a processing element for determining if the object is present in the area by comparing the reference image and the live image. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification