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METHOD FOR AUTOMATIC REGION SEGMENTATION ON CARTRIDGE CASE BASE AND SELECTION OF THE BEST MARK REGION FOR CARTRIDGE CASE COMPARISON
METHOD FOR AUTOMATIC REGION SEGMENTATION ON CARTRIDGE CASE BASE AND SELECTION OF THE BEST MARK REGION FOR CARTRIDGE CASE COMPARISON
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机译:基于案例集的区域自动分割方法和案例比较最佳标记区域的选择
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摘要
Segmentation of certain regions defined on a firearm cartridge case forsuccessful automaticmatching of cartridge cases after a cartridge is fired, on the basis of themarks left on thecartridge cases fired. Disclosed is a method for segmentation of a cartridgecase base byusing surface height matrix information comprising; detecting the center ofthe cartridgecase base; according to this center, obtaining the polar height matrix bysubjecting thesurface height matrix to polar transformation; acquiring a one-dimensionalsignal, "AverageHeight Signal on Basis Radius (AHSBR), by calculation of the mean value on theradius axisapplied on the polar height matrix; determining regions similar to circlesignal models on theAHSBR and detecting circles; determining the firing pin mark region bythresholdprocessing of the primer region surface height matrix. Letters on thecartridge case base aredetected by using slope matrices.
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