数字图像处理实验三Experiment III (2 periods).docVIP

福建农林大学计算机与信息学院实验报告课程名称：数字图像处理（双语）（Digital Image Processing）姓 名：系：计算机科学与技术专 业：计算机科学与技术年 级：2012级学 号：指导教师：职 称：副教授20142015学年下学期福建农林大学计算机与信息学院实验报告系： 计算机科学与技术 专业：计算机科学与技术 年级：2012级 姓名： 学号： 实验室号 田家炳510 计算机号实验时间：2015年5月 日 指导教师签字： 成绩： Experiment III Implement convolution filter to obtain image smoothing as well as edge enhancement (validated)（2 periods）ObjectiveGet fully understand of the notion of the convolution and its applications on image smoothing and enhancement MethodologyConvolute an image with different dedicated designed function to get image smoothing and image edge enhancement by means of MATLAB.Environment Hardware: General PC Operating system: Windows XP Calculating platform: MATLAB 6.5 or higher version jpg=imread(E:university数字图像处理实验3test.jpg); j=rgb2gray(jpg); imshow(j);加入乘性噪声： x=imnoise(xx,speckle,0.02); imshow(x);Experiment in detail:1Image smoothing with different size of spatial masksA. Image smoothing with arithmetic averaging filter (spatial convolution). h=ones(3,3)/9; hh = 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 x1=imfilter(x,h); subplot(121);imshow(x);title(原图); subplot(122);imshow(x1);title(经过（3*3）邻域平均后图); h1=ones(5,5)/25; h1h1 = 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 0.1111 x2=imfilter(x,h1); subplot(121);imshow(x);title(原图); subplot(122);imshow(x2);title(经过（5*5）邻域平均后图);B. Make a comparison of noise reduction by both median filter and averaging filter. avgx=filter2(fspecial(average,5),x)/255; midx=medfilt2(x,5,5); subplot(131);imshow(x);title(原图); subplot(132);imshow(avgx);title(经过（5*5）均值滤波图); subplot(133);imshow(midx);title(经过（5*5）中值滤波图);2Edge enhancement by means of spatial filtering.A. Develop a program to implement a Gradient Mask to obtain edge of an object (in compare with the function provided by Matlab) subplot(231);imshow(j);title(原图); eSoble=edge(j,sobel); subplot(232);imshow(eSoble);title(Soble图); ePrewitt=edge(j,prewitt); subplot(233);imshow(ePrewitt);title(Prewitt图); eRobert=edge(j,roberts); subplot(234);imshow(eRobert);title(Robert图); eLog=edge(j,log); subplot(235);imshow(eLog);title(Log图); eCanny=edge(j,canny); subplot(236);imshow(eCanny);title(Canny图);B. Image enhancement with High-Boost Filtering Mask and compare with the result of the operation defined by equation subplot(131);imshow(j);title(原图); H=-1 -1 -1;-1 -9 -1;-1 -1 -1; xhigh=filter2(H,j); subplot(132);imshow(xhigh,);title(高通滤波); jdouble=double(j); M=1 1 1;1 1 1;1 1 1/9; xmask=double(xhigh); xmask2=filter2(M,xmask); xm=xmask-xmask2; subplot(133);imshow(xresult);title(掩膜处理);Experimental resultData in whatever chart, image and other form is required with explanati