东南大学学报（英文版）2004，Vol.20Issue(2)：181-186,6.
碎片拼合的轮廓提取和曲率计算
Contour extraction and curvature calculation for fragment reassembly
摘要
Abstract
The Canny edge detector inevitably misses some important and obvious edges during contour extraction, which causes gaps in the contour. We propose a geometric method to locate, measure and fill the gaps precisely. With the complete contour information, we present a convolution approach, which utilizes an appropriate linear interpolation to resample the contour to calculate pointwise curvature. This approach distributes discrete points within a convolution window uniformly. It ensures a one-to-one correspondence between every point and its weight, thus the accuracy is guaranteed under this condition. A related parameter selection is also suggested. Experimental results show that the proposed methods are robust and accurate.关键词
轮廓提取/曲率计算/卷积积分/离散点Key words
contour extraction/curvature calculation/convolution integral/discrete points分类
信息技术与安全科学引用本文复制引用
朱延娟,张丽艳,周来水..碎片拼合的轮廓提取和曲率计算[J].东南大学学报（英文版）,2004,20(2):181-186,6.基金项目
The National Natural Science Foundation of China (No.60273097), the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE, P. R. C., and Scientific Foundation of Nanjing University of Aeronautics and As （No.60273097）
