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ACQUISITION OF 3D TOPOGRAPHIC IMAGES OF TOOL MARKS USING NON-LINEAR PHOTOMETRIC STEREO METHOD
ACQUISITION OF 3D TOPOGRAPHIC IMAGES OF TOOL MARKS USING NON-LINEAR PHOTOMETRIC STEREO METHOD
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机译:使用非线性光度立体法获取工具标记的3D地形图像
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摘要
There is described a method and 3D image acquisition system for addressing the specular nature of metallic surfaces in general, and ballistic pieces of evidence in particular, using photometric stereo by identifying and solving a plurality of sets of non-linear equations comprising a diffusive term and a specular term to determine a surface normal vector field N(x,y), and using N(x,y) to determine a 3D topography Z(x,y).
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