摘要
自动聚焦技术是提高压痕直径测量系统测量精度、智能化和自动化的重要手段。介绍了采用图像处理法实现压痕直径测量系统的自动聚焦技术,核心就是选择一个合适的图像清晰度评价函数。在研究了众多图像清晰度评价函数的基础上,提出了基于向量模型和改进DCT变换的图像清晰度评价函数,实验表明,提出的算法具有良好的单峰性、准确性、稳定性、可靠性和快速性。最后通过基于COM组件技术的Matlab与VB混合编程来保证算法实现和软件设计。
Auto - focusing technique is an important method to improve the precision, intelligentization, automatization for the indentation diameter measurement. The paper introduces an auto - focus method of indentation diameter measurement based on image processing. Hard core of the auto -focusing technique is the evaluation function＇s selection. Based on the auto - focusing algorithms investigation, image sharpness evaluation functions are built based on vector model and DCT. Using experiments, it is found that the algorithms put forward in this paper have evidently im- proved the unimodality, accuracy, stability, reliability and rapidity. And software design is realized by the mixed programming between VB and MATLAB based on the COM technology.
出处
《计算机仿真》
CSCD
北大核心
2009年第7期256-259,共4页
Computer Simulation
关键词
自动聚焦
压痕直径测量
清晰度评价函数
混合编程
Auto - focus
Indentation diameter measurement
Evaluation functions
Mixed programming
