基于matlab的图像去噪算法设计与实现摘要随着我们生活水平的提高，科技产品飞速更新换代，在信息传输中，图像传输所占的比重越来越大。但自然噪声会在图像传输时干扰其传输过程，甚至会使图片不能表达其原来的意义。去噪处理就是为了去除图像中的噪声，从而提升图像质量。因此，研究针对噪声的去噪方法是十分必要的。文中首先分析了几种图像的去噪算法相关知识。有许多类型的图像去噪法，可以分为以下两种方法：空间滤波和频率场滤波。本文主要介绍了中值滤波、均值滤波、频域低通滤波去噪算法。首先，嵌入它们的共同功能及其在图像处理应用中的用途。其次，阐述了一些去噪算法的原理和特点。最后，matlab用于对图片模拟和去噪。Matlab仿真结果表明，不同的去噪算法各有优势。在这些去噪算法中，均值滤波是一种较为普遍的线性滤波，一般适用于高斯噪声的类型。中值滤波是一种比较常见的非线性过滤，特别是对于椒盐噪声，使用中值滤波法效果更佳。因此，在对一幅图片进行去噪操作之前，首先要分析噪声的类型以及其产生的原因，然后再选择合适的去噪算法，这样才能达到比较好的去噪效果。关键词：图像噪声；图像去噪算法；中值滤波；均值滤波；matlab。IIIAbstractWiththeimprovementofourlivingstandardsandtherapidupgradingoftechnologyproducts,imagetransmissionaccountsforalargerproportionininformationtransmission.However,naturalnoisewillinterferewiththetransmissionprocessduringimagetransmission,andeventhepicturecannotexpressitsoriginalmeaning.Denoisingisdonetoremovenoisefromtheimageandimproveimagequality.Therefore,itisnecessarytostudythedenoisingmethodfornoise.Inthispaper,theknowledgeofseveralimagesofdenoisingalgorithmsisfirstanalyzed.Therearemanytypesofimagedenoisingmethodsthatcanbedividedintothefollowingtwomethods:spatialfilteringandfrequencyfieldfiltering.Thispapermainlyintroducesmedianfiltering,meanfiltering,andfrequencydomainlow-passfilteringdenoisingalgorithms.First,embedtheircommonfeaturesandtheiruseinimageprocessingapplications.Secondly,theprinciplesandcharacteristicsofsomedenoisingalgorithmsareexpounded.Finally,matlabisusedtosimulateanddenoisepictures.Matlabsimulationresultsshowthatdifferentdenoisingalgorithmshavetheirownadvantages.Amongthesedenoisingalgorithms,meanfilterisamoregenerallinearfilter,whichisgenerallyapplicabletothetypeofGaussiannoise.Medianfilteringisacommonnon-linearfiltering,especiallyforsaltandpeppernoise,theuseofmedianfilteringmethodisbetter.Therefore,beforedenoisingapicture,firstanalyzethetypeofnoiseandthecauseofthenoise,andthenselecttheappropriatedenoisingalgorithm,inordertoachieveabetterdenoisingeffect.Keywords:PatternNoise;ImageDenoisingAlgorithm;MedianFiltering;Meanfiltering;Matlab.IV目录摘要........................................................................................................................................IIIAbstract...................................................................................................................................III第1章绪论...............................................................................................................................41.1课题研究背景...............................................................................................................41.2国内外研究现状...........................................................................................................41.3课题研究重点和思路...................................................................................................5第2章Matlab图像处理基础..............................................
