Non-Contact Measurement for Outside Screw Based on a Modified  Sub-Pixel Edge Detection Algorithm of Zernike Moments
CAI Yan1,YE Lianxiang2,SUN Dawei1,TIAN Hua2,ZHU Junjie1,HU Zhiyun2
Journal of Shanghai Jiaotong University . 2014, (10): 1468 -1472 .