摘要
介绍了相关去噪、模极大值去噪和小波阈值去噪3种传统的去噪方法的原理,分析了小波阈值去噪方法的缺点.提出了新的阀值确定方法,并应用一种新的小波阈值函数处理小波系数实现去噪.最后,用Matlab仿真软件对新的小波阀值去噪方法进行了验证,仿真结果表明新阈值去噪算法的优越性和有效性.
Three traditional denoising methods which include related denoising, wavelet modulus maxima denoising and threshold denoising are described. The shortcoming of the wavelet threshold denoising method is analysed,and a new method for determining the threshold is proposed, then a new wavelet threshold function processing wavelet coefficient is used to achieve denoising function. Finally, the new wavelet threshold denoising method is verified by Matlab simulation software. The simulation result further shows superiority and effectiveness of the new threshold algorithm.
出处
《兰州交通大学学报》
CAS
2012年第3期120-124,共5页
Journal of Lanzhou Jiaotong University
关键词
小波去噪
阈值
阈值函数
模极大值
wavelet denosing
threshold
threshold function
modulus maxima
