图像空域增强技术及联合运用

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1、实验二图像空域增强技术及联合运用一、实验目的掌握各种灰度变换技术，加深对灰度变换的理解；掌握在空域中进行图像噪声消除、图像平滑和图像锐化等各种改善图像质量的方法；通过联合应用实验，提高同学门灵活运用知识的能力；二、实验内容1.从硬盘中读取需进行增强的人体骨骼图像；2.求原图像的Laplacian变换，对图像进行锐化处理;3.用Sobel算子计算原图像的梯度图像；4.图像的算术运算，包括加和乘；5.图像的平滑处理去除噪声；6.图像灰度的幕律变换，以加强图像的对照度；三、实验流程参考四、参考程序与处理结果%Enhancingaimageofwholebodybonescanbycombinin

2、gvariousspatial%enhancementmethods,thestrategiesisasfollowing:%========================================================%1.UtilizetheLaplaciantohighlightfinedetail%2.Utilizethegradienttoenhanceprominentedges%3.CombineLaplacianandgradienttogetthedetail-enhancedandnoise-compressedimage%4・Increasethec

3、ontrastoflowgraylevelsbyusingagray-leveltransformation.%==========================================================%Theoriginalimagenamed*Fig0306(a)(bone-scan)・tifisunderthe%directory:J:courseteachingd1^N§l%Tn,

4、AiEpN6E%Ayl%ln%CopyrightbyHuangzhongchao,July16,2006clearall;closeall;f=imread(*J:c

5、ourseteachingd1/^N§l%lnz

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7、iNeE%Ayl%lhFig0306(a)(bone-scan).tif,);f1=im2double(f);hi=fspecial('sober);%ordirectlytypeh=[-1-2-1;000;121];g1=imfilter(f1,h1);subplot(121);imshow(f);title('theoriginalimage1);%b1=mat2gray(g1);subplot(122);imshow(g1);title('theSobelgradient*);%procducingaaveragein

8、gfilterh2=fspecial('average：5);g2=imfilter(g1,h2);figure⑵；subplot(121);imshow(g2);title(*thesmoothedgradientimage1);h3=[-1-1-1;-18-1;-1-1-1];%Laplacianmaskg3=imfilter(f1,h3);%b2=mat2gray(g3);subplot(122);imshow(g3);title('theLaplacianimage');g4=g3+fi；figure(3);subplot(121);imshow(g4)title('sharped

9、imagebyaddinglaplacianfilteredandoriginalimage1);g5=g4.*g2;subplot(122);imshow(g5);title('theproductofsmoothedgradientandLaplacianimage);g6=g5+fi；figure(4);subplot(121);imshow(g6);title('thesumofproductandoriginalimage*);%constrastspreadingbypower-lawtransformationwithr=0.5andc=1;gamma=0.5;C=1；g7=

10、c.*g6.Agamma;figure(4);subplot(122);imshow(g7);title('theendresultbycombiningthesharpingandgradientoperatiorT);运行结果参考: