Case: Micro-Texture Anti-Counterfeit Verification
案例：微纹理防伪拓印核验
标签：防伪,微纹理,随机点阵,拓印核验,批次比对
某证章厂在黄铜徽章背面压印随机微点阵（点径 0.15 mm、间距 0.4 mm），出厂前用炭黑拓片记录该批次唯一纹理存档。核验时对存疑件重拓一次，与档案图做像素相关比对（相关系数大于 0.92 判真）。拓印不划伤镀层且比显微拍照快捷，已成为该厂标准质检环节。
A badge maker stamps a random micro-dot matrix on the back of brass badges (0.15 mm dots at 0.4 mm pitch) and archives a lampblack rubbing of each batch's unique texture before shipping. To verify a suspect piece, take a fresh rubbing and pixel-correlate it with the archive (coefficient above 0.92 passes). Rubbing never scratches the plating and beats microscopy for speed—now a standard QC step. ---