System and method for detecting objects with differential operators
First Claim
1. A system for distinguishing a specific object from other objects residing within an enclosed container, comprising:
- an acquisition subsystem for acquiring information pertaining to a specific object;
a reconstruction subsystem for reconstructing acquired information pertaining to the specific object into image data; and
a computer-aided detection subsystem adapted for identifying the specific object through differential operators.
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Accused Products
Abstract
A system and a method for detecting an object, such as an explosive device or material, located within a closed article, such as a piece of luggage or a parcel. The system includes an acquisition subsystem for acquiring information pertaining to a specific object, a reconstruction subsystem for reconstructing acquired information pertaining to the specific object into image data, and a computer-aided detection subsystem adapted for identifying the specific object through the use of differential operators. The method includes obtaining image data of the one object, computing a differential operator for each voxel of the image data, computing eigenvalues and eigenvectors for each of the voxels, and computing a scalar function of the eigenvalues to ascertain whether each of the voxels represents a portion of the one object.
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Citations
45 Claims
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1. A system for distinguishing a specific object from other objects residing within an enclosed container, comprising:
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an acquisition subsystem for acquiring information pertaining to a specific object; a reconstruction subsystem for reconstructing acquired information pertaining to the specific object into image data; and a computer-aided detection subsystem adapted for identifying the specific object through differential operators. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for distinguishing a specific object from other objects residing within an enclosed container, comprising:
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an acquisition subsystem for acquiring information pertaining to a specific object, wherein the acquisition subsystem comprises a computed tomography machine; a reconstruction subsystem for reconstructing acquired information pertaining to the specific object into image data; and a computer-aided detection subsystem adapted for identifying the specific object through differential operators, wherein the computer-aided detection subsystem comprises more than one stage. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system for identifying a specific object from other objects resident within an enclosed container, comprising:
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an acquisition subsystem for acquiring information pertaining to a specific object; a reconstruction subsystem for reconstructing acquired information pertaining to the specific object into image data; and a means for identifying the specific object through the use of differential operators, wherein vectors derived from the differential operators are used in the identification of the specific object. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A method for distinguishing a specific object from other objects within an enclosed container, comprising the steps of:
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obtaining image data of a specific object; computing a differential operator for each voxel of the image data; computing eigenvalues and eigenvectors for each of the voxels; and computing a scalar function of the eigenvalues to ascertain whether each of the voxels represents a portion of the specific object. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for distinguishing one locally sheet-like object from other objects within an enclosed container, comprising the steps of:
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obtaining image data of a locally sheet-like object; computing a differential operator for each voxel of the image data with at least one stage of a computer-aided detection subsystem; computing eigenvalues and eigenvectors for each of the voxels; and computing a scalar function of the eigenvalues to ascertain whether each of the voxels represents a portion of the locally sheet-like object; wherein the scalar function responds to a greater degree to locally sheet-like materials than to materials having other geometries. - View Dependent Claims (41, 42, 43, 44, 45)
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Specification