Image analysis – Applications
Patent
1998-02-11
2000-06-13
Au, Amelia
Image analysis
Applications
382131, 382154, 382205, 378 4, 345424, 25036304, G06K 900, G06K 956, A61B 600, G01T 1166
Patent
active
060758716
ABSTRACT:
A method and apparatus for detecting objects in computed tomography (CT) data, including sheet-shaped objects such as sheet explosives, analyze a neighborhood of voxels surrounding a test voxel. Erosion of the data can be performed by identifying a neighborhood of voxels surrounding a voxel of interest. If the number of voxels having densities below a predetermined threshold exceeds a predetermined number, then it is assumed that the test voxel is a surface voxel and is removed from the object. A connectivity process can be applied to voxels to combine them into objects after sheets are detected to prevent sheets from being inadvertently removed from the data by erosion. A dilation function can then be performed on the eroded object to replace surface voxels removed by erosion.
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Bechwati Ibrahim M.
Crawford Carl R.
Hiraoglu Muzaffer
Simanovsky Sergey
Analogic Corporation
Au Amelia
Dastouri Mehrdad
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