基于小波变换与中值滤波的CT图像去噪研究

enoising is an important issue in image processing．Denoising with median filter has tradeoff between reducing the noise level and preserving the high -frequency edges of the image. Denoising with wavelet transformation is the method cannot on1y remove the noise of the image but also preserve the edg- es and details of the image, which is useless to the salt&sepper noise. The paper eliminate Gauss noise and salt&sepper noise from the CT image based on wavelet transformation and median filter. Its result was better, compared with wavelet transformation only.