关键词: 医学图像，图像去噪，经验模式分解，边缘保持，熵

Abstract: Image denoising plays an important part in medical image processing,denoising the medical images is the basis for further analysis and calculations. To extend the on}dimensional EMI)method to two-dimensional, a novel edges preserved image denoising method for medical images based 2D EMD was proposed. Firstly, decomposed the image by EMD，and the intrinsic mode function(lMF) and the remaining component of the image were obtained. Image noises and edges information arc focus on the IMF. Secondary, decomposed the IMF into high frequency component and the remaining component by EMD. Finally, added the two remaining components, the edges preserved denoise image was obtwined. Experiments show that the proposed method can remove noises in the image and keep image edges information.

Key words: Medical images, Image denoising, Empirical mode decomposition, Edges preserve, Entropy