【摘要】 提出一种基于二维S变换的时频滤波方法。S变换融合了短时傅里叶变换和小波变换的优点,适合医学图像处理。该方法在局部频谱利用硬阈值去噪,可用于心肌声学造影图像降噪。降噪实验表明了该方法的有效性和临床应用价值。更多还原

【Abstract】 This paper proposes a time-frequency filtering method based on S transform.S transform inherits the advantages of the wavelet transform and short time Fourier transform.It is suitable for medical image processing.This method uses hard threshold for de-noising in local spectrum, and can be used in image de-noising of the Myocardial Contrast Echocardiography(MCE).Experiment of de-noising demonstrates its validity and clinical application value.更多还原