毕业论文---基础图像去噪算法研究与实现.doc

PAGE 摘要 图像是一种重要的信息源,通过图像处理可以帮助人们了解信息的内涵。图像中的噪声会妨碍人们对图像的理解,而图像去噪的目的就是去除图像中的噪声,提高人们对图像的认知程度,以便对图像作进一步地处理。数字图像噪声去除涉及光学系统、微电子技术、计算机科学、数学分析等领域,是一门综合性很强的边缘科学,如今其理论体系已十分完善,且其实践应用很广泛,在医学、军事、艺术、农业等都有广泛且成熟的应用。MATLAB是一种高效的工程计算语言,在数值计算、数据处理、图像处理、神经网络、小波分析等方面都有广泛的应用。MATLAB是一种向量语言,它非常适合于进行图像处理。本论文的主要工作就是对图像的几种去噪算法进行了一定的介绍,并对其中的一些算法作了进一步地研究,对它们进行仿真实验分析它们的去噪效果。 文章第一章介绍了数字图像去噪算法的发展概况和研究现状。在总结一些传统去噪算法的同时指出了去噪算法中必威体育精装版的研究领域。第二章介绍了图像噪声类型和评价标准，常见的噪声分为脉冲噪声和高斯噪声，图像的质量评价方法有两种:一种是主观评价,另一种是客观评价。一般客观评价的方法应用更广泛。第三章详细介绍了传统的图像去噪算法，包括邻域平均法、空域低通滤波法、多幅图像平均法、中值滤波法、自适应中值滤波法以及维纳滤波法。介绍了这些算法的原理,滤波过程,对中值滤波器、自适应中值滤波器和维纳滤波的特性,滤波过程以及其存在的缺陷和优点进行了详细的分析和讨论,并且通过MATLAB对以上算法进行了详细的仿真实验,分析了它们的去噪性能。并介绍了非局部均值的去噪。 关键词：图像去噪；非局部均值；加权平均；高斯噪声 Abstract Image is an important source of information, through the connotation of image processing can help people understand the information. The noise in the image will interfere with peoples understanding of images, and the image denoising is to remove the image noise, enhance the perception of the image, in order to make further processing of images. Digital image noise removal relates to the field of computer optics, microelectronics, science, mathematical analysis, is a boundary science comprehensive very strong, now its theoretical system has been perfect, and its application is very extensive, have wide application and mature in the medical, military, art, agriculture etc.. MATLAB is an efficient engineering calculation language, in the numerical calculation, data processing, image processing, neural network, wavelet analysis has been widely used. MATLAB is a vector of language, it is very suitable for image processing. The main work of this paper is on several image denoising algorithms are introduced, and some methods for the further research, simulation experiment is carried out their denoising effect analysis of them. The first chapter introduces the general situation of denoising algorithm for digital image of development and current research situation. At the concl