摘要
提出一种新的阈值函数,有效地克服了小波硬阈值函数不连续,小波软阈值函数出现恒定偏差的缺陷,具有优越的数学特性和清晰的物理意义.实验结果表明本文算法在峰值信噪比和均方误差的框架下均取得较好的去噪效果,同时在视觉上也取得了令人满意的结果.
The paper proposed a new threshold function.It overcomes the non-consistence of hard threshold function of wavelet and deviation of soft threshold of wavelet.It has good mathematic characters and clear meanings of physics.The experimental results show that it obtains good results based on PNSR and MSE and good results in vision.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2011年第4期56-58,共3页
Journal of Harbin University of Science and Technology
基金
黑龙江省教育厅科学技术研究项目(11553040)
关键词
小波变换
硬阈值
软阈值
wavelet transform
hard threshold
soft threshold