标牌图像的旋转不变性矢量提取及其PCA子空间识别*
宋怀波,路长厚,李建美,卢国梁
Rotate Invariant Vector Extraction of Pressed Protuberant Characters on Metal Label and PCA Based Recognition
SONG Huai-Bo, LU Chang-Hou, LI Jian-Mei, LU Guo-Liang
模式识别与人工智能 . 2008, (6): 824 -830 .