METHODS FOR DETERMINING A POSITION AND SHAPE OF A BAG PLACED IN A BAGGAGE HANDLING CONTAINER USING X-RAY IMAGE ANALYSIS
First Claim
1. A method, comprising:
- configuring an explosive detection system to distinguish a contour of a bag from a contour of a tub in which the bag rests; and
obtaining bag contour data from a computer analysis of a pre-scan x-ray image of the bag resting in the tub.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved explosive detection system is configured to determine bag contour data from a pre-scan x-ray “ground truth” image of a bag that rests within a container. The bag contour data may be used to restrict a subsequent main x-ray scan to the bag and its contents. The bag contour data is determined by calculating probability distributions “P(I)Tub, r/L” for the intensity values “I” and probability distributions “P(E)Tub, r/L” for the entropy values “E” of each pixel of the “ground truth” image. The “ground truth” intensity and entropy probability distribution data can be used to create one or more “ground truth” histograms. Based on a comparison of these one or more “ground truth” histograms with the one or more statistical model histograms, the “tub” pixels can be extracted (e.g., subtracted) from the “ground truth” image.
20 Citations
24 Claims
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1. A method, comprising:
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configuring an explosive detection system to distinguish a contour of a bag from a contour of a tub in which the bag rests; and obtaining bag contour data from a computer analysis of a pre-scan x-ray image of the bag resting in the tub. - View Dependent Claims (2, 3, 5, 8)
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4. A method, comprising:
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obtaining an x-ray image of a bag and a container, wherein a portion of the bag rests in the container; comparing data extracted from the the x-ray image with a statistical model of a container image and its image properties; and estimating a likelihood of a pixel of the x-ray image to be one of a “
bag”
pixel and a “
container”
pixel. - View Dependent Claims (6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. The method of claim 24, wherein the one or more alarm objects are selected from the group consisting of explosives, illegal drugs, weapons, and combinations thereof.
Specification