毕业设计matlab编程.doc

将视频截取成帧 fileName = q.avi; %此处输入视频名称，要带后缀，注意好像只有wmv和avi格式 obj = VideoReader(fileName); numFrames = obj.NumberOfFrames;% 帧的总数 for k = 1 :numFrames% 读取数据 frame = read(obj,k); imshow(frame); imwrite(frame,strcat(num2str(k),.jpg),jpg);% 保存帧 End 灰度二值化图像 for i=1:numberofframe%numberofframe为图像张数 imageName=strcat(num2str(i),.jpg); I = imread(imageName); imggray = rgb2gray(I);%灰度化图像 imwrite(imggray,strcat(num2str(i),huidu.jpg),jpg);% 保存帧 i2=im2bw(I);% i2是二值图像，不需要求阈值 imwrite(i2,strcat(num2str(i),erzhi.jpg),jpg);% 保存帧 end 背景差分法 filename = 103.jpg;%读原图 I = imread(filename); X = rgb2gray(I);%读，灰度原图 filename = YCBJ.jpg;%读取背景图 M = imread(filename); Y = rgb2gray(M);%读，灰度背景图 Z = imabsdiff(X,Y);%两图相减 level = graythresh(Z); Z = im2bw(Z,level);%二值化图 % 膨胀腐蚀算子，相当于闭操作 se = strel(disk,2); Q=imerode(Z,se);%腐蚀 Q=imdilate(Q,se);%膨胀 lab1=原图; lab2=背景; lab3=差分二值化后; lab4=腐蚀膨胀后; subplot(221);imshow(I);title(lab1); subplot(222);imshow(M);title(lab2); subplot(223);imshow(Z);title(lab3); subplot(224);imshow(Q);title(lab4); 三帧差分法 filename1=110.jpg;%读取前一帧 I1 = imread(filename1); O = rgb2gray(I1);%读，灰度前一帧 filename2=115.jpg;%读取中间帧图像 I2 = imread(filename2); P = rgb2gray(I2);%读，灰度当前帧 filename3=120.jpg;%读取后一帧图像 I3 = imread(filename3); Q = rgb2gray(I3);%读，灰度后一帧 A = imabsdiff(P,O); level1 = graythresh(A); A = im2bw(A,level1);%二值化前两帧差图 subplot(131);imshow(A); B = imabsdiff(Q,P); level = graythresh(B); B = im2bw(B,level);%二值化后两帧差图 subplot(132);imshow(B); for i=1:480 for j=1:720 C(i,j)=A(i,j)*B(i,j); end end subplot(133);imshow(C);%二AB两图相与 帧差分循环读写 for i=1:numberofframe%numberofframe为帧数 filename=strcat(num2str(i),.jpg); I = imread(filename); X = rgb2gray(I);%读，灰度原图 filename = YCBJ.jpg; M = imread(filename); Y = rgb2gray(M);%读，灰度背景图 Z = imsubtract(Y,X);%两图相减 lev