摘要
针对小波边缘检测阈值设定问题,本文提出了一种基于小波分析的改进阈值设定方法,采用一个矫正因子β来构造一个新的阙值函数,调整软硬阚值的恒定偏差。实验证明,新阈值函数不但整体上连续性好而且在克服硬阙值函数的不连续以及软阈值函数在处理较大小波系数时总存在恒定偏差这2个不足的同时,又保留了软、硬阈值函数原有的优点。
As for how to choose a proper threshold in the edge detection, a method of improving threshold based on wavelet analysis was proposed in this paper. We reconstructed a new threshold function through an adaptive parameter β to adjust the invariableness windage of the soft-threshold and hard-threshold. Experiment results show that the new threshold function not only can be continuous, but also can preserve the advantage of the soft-threshold and hard-threshold.
出处
《国外电子测量技术》
2007年第3期12-13,共2页
Foreign Electronic Measurement Technology
关键词
小波分析
软阈值
硬阈值
去噪
wavelet analysis
soft-threshold
hard-threshold
