MATLAB图像边缘提取图像高斯低通滤波DCT变换程序

1、实验二边缘提取作业要求:1.参考空间域图像增强课的内容，用Sobel边缘算子提取图像边缘实验程序如下：RGB=imread(E:图像信号处理bmp格式图片美女.bmp);isrgb(RGB);figure;imshow(RGB);I=rgb2gray(RGB);imshow(I);colorbar(horiz);isgray(I);ED=edge(I,sobel,0.08);imshow(ED)运行结果如下：D1D2D3D1D50归2.xEileEditYi的IrisertluolsDectopJLindovHelpElieEditKievInsertloaLsDesktop11adwHelp

2、0金口邑E直71asD1030405060MBEiliE.dit野.曲InsAttIool-=op世indo#HGp司圉旦D金7呂贬冈E：LeditEi亡rrIps&i*tToolsH亡ski叩tindonrHlp10305060f.LltQd.LtEieivIjisertlatxlsDesktopHmdoh-HelpLilt.diterflLnseartloc-lsHcsktopImdcvHeLpD姿曰旨h靈远O实验四高斯低通滤波器作业要求:参考“频率域图像增强”课的内容,采用高斯低通滤波器对图片进行滤波操作,取半径为5,15,30,80和230,分别输出结果图片实验程序如下：(d0=5)l

3、1=imread(E:图像信号处理bmp格式图片荷花.bmp);I=rgb2gray(I1);s=fftshift(fft2(l);M,N=size(s);n=2;d0=5;n1=floor(M/2);n2=floor(N/2);fori=1:Mforj=1:Nd=sqrt(i-n1)A2+(j-n2F2);h=1*exp(-1/2*(dA2/d0A2);s(i,j)=h*s(i,j);endends=ifftshift(s);s=uint8(real(ifft2(s);figure;imshow(s);title(GLPF滤波(d0=5);GLFF遊遊dC=5)I-l|rXlittirlId

4、oIslini:vKlpnB谆檢礒鋼運）.3回D口昔命SIGLPFfei：dO=3C.GLPFtfEKKdQ=3O)I7,n|x|KileE.ditLnsertToolsOeiktopi.Ln.dnYHelp加ElIc-EdiI：riLnswI：toolsJjeJdopimdovHelp&n仿翌宜即晅匠口它RdiE工irrImert.IjoLh出injAmnEklpElIeEditMLcnrLusertILanlsHerk七阿BfindjcvHJjaR呂題耳霁旦近口居s回D孟口縛k欧耳旳越近GLPF滤浪(d0=5)H=1-O0金口国題直榔宜DK:住旦：H倚kt叩Hindor疋1卫EilsdiL

5、im0iElZaolsQA-dctop,iid.MtjalpD虜日寻IB題目鋼迪.密祠丨回GLFFit?dQ=5JDDaEEil-s.ditYi虫r*口LzartIool=Qa日Nap臣indoA1MLpEjleditYlc-Iu.5erloolsDesktopZindoHeLjGLPF谑法CdG-23OfGLPF德液dO=BO)实验六DCT变换作业要求:1.参考“图像压缩”课的内容,并参考有关资料,对输入图像进行离散余弦变换2.通过离散余弦逆变换,还原出原图片实验程序如下：RGB=imread(E:图像信号处理bmp格式图片美女.bmp);figure(1);imshow(RGB);I=rg

6、b2gray(RGB);figure(2);imshow(I);J=dct2(I);figure(3);imshow(log(abs(J),);colormap(jet(64);colorbar;J(abs(J)IixiEileEditiewLjisertToolslesktopWindowHelp$igure4EileEditMiewIjisertIooIeResktopKindovHelp，y#i独巳舒眶EileEdityiewInsertIciolsHesktopHin丁卅HelptileBlitYiewInEertIooIeUesktnp崔mdcHelp浬匚ISlO|k7EUCKEil*ditXiivXnEertJodIeindovKLpfH.曙罰號邀氐和召I;舉I口翩口LiltQd.LtInstrtloalsKtzktoptinilmrHelp5虜日与丨hl檢直紳倒運.朋亘丿Fiftuie1TiSiXl，f询匚口匚医l1c.ditieri-InsertIdoIs氐ski.pp乂LmdixwKtlp渗口旨k霁近目用旦E.l1S.dit磴iawb=灯七dcIz山山!.叫i空iri4nMlp隹口氏口昌I