摘要
小波阈值去噪是信号处理中一种重要的去噪方法,针对常用硬阈函数不连续的特点以及软阈值函数存在偏差的问题,提出了一种新的阈值处理方法,在matlab7.0中的仿真试验结果表明,新的阈值方法的去噪效果无论在视觉效果上,还是在信噪比和最小均方误差意义上均优于传统的硬阈值和软阈值。
Wavelet threshold de-nosing is an important de nosing method in the signal processing. A new threshold function based on the wavelet threshold de-nosing is presented. The method can overcome the shortcoming of the hard threshold with discontinuous functions and solve the problem of the bias in soft threshold functions. The de noising effect of the new threshold method is better than the traditional hard threshold or soft threshold method in visual effect, signal to noise ratio or mean square error. Simulation results in matlab7.0 show that the new threshold function is effective.
出处
《电脑开发与应用》
2008年第5期58-59,共2页
Computer Development & Applications
关键词
小波变换
阈值去噪
均方误差
信噪比
wavelet transform, threshold de-nosing, Mean Square Error （MSE）, Signal to Noise Ratio （SNR）
