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How to select the best trace area for shell case-based automatic region segmentation and shell case comparison
How to select the best trace area for shell case-based automatic region segmentation and shell case comparison
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机译:如何为基于外壳案例的自动区域分割和外壳案例比较选择最佳跟踪区域
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摘要
Segmentation of certain regions defined on a firearm cartridge case for successful automatic matching of cartridge cases after a cartridge is fired, on the basis of the marks left on the cartridge cases fired. Disclosed is a method for segmentation of a cartridge case base by using surface height matrix information comprising: detecting the center of the cartridge case base; according to this center, obtaining the polar height matrix by subjecting the surface height matrix to polar transformation; acquiring a one-dimensional signal, Average Height Signal on the Basis of Radius (AHSBR), by calculation of the mean value on the radius axis applied on the polar height matrix; determining regions similar to circle signal models on the AHSBR and detecting circles; determining the firing pin mark region by threshold processing of the primer region surface height matrix. Letters on the cartridge case base are detected by using slope matrices.
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