摘要
在D.L.Donoho提出的小波阈值去噪方法的基础上,构造了一个新的阈值函数,它与软阈值函数一样具有连续性,同时还克服了软阈值函数中估计小波系数与分解小波系数之间存在着恒定偏差的缺陷.仿真结果表明,利用新阈值函数进行图像去噪,克服了硬、软阈值函数的缺点,能够较好去掉噪声并且保留图像的细节.
Based on the study of the disadvantages of the Dohono＇s threshold function-the hard threshold function and the soft threshold function,a new threshold function that possess the continuity and eliminate the constant gap between the coeffients of wavelet transform and results of soft function is proposed.The simulation results show that the new threshold function eliminates the noise effectively and presents better MSE performance and PSNR.
出处
《吉林化工学院学报》
CAS
2013年第7期82-85,共4页
Journal of Jilin Institute of Chemical Technology
关键词
图像去噪
小波变换
阈值函数
image denoising
wavelet transform
threshold function
