数字图像处理指令及效果.doc

数字图象处理 1图象读取及彩色图象转化为灰度图象 指令： clear close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\1.jpg); subplot(121),imshow(I); title(‘原图’); L=rgb2gray(I); subplot(122),imshow(L); title(‘灰度变换’） 2直方图 指令: clear close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg); subplot(121),imshow(I); title(‘原图’); L=rgb2gray(I) subplot(122),imhist(L); title(‘原图直方图’) 3图象旋转 指令： clear close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg); subplot(121),imshow(I); title(‘原图’); theta = 30; K = imrotate(I,theta); subplot(122),imshow(K); title(‘旋转后图’) 边缘检测 clear close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\1.jpg); subplot(121),imshow(I); bw1=im2bw(I); bw2=double(bw1); J1=edge(I,’sobel’); J2=edge(I,’prewitt’); J3=edge(I,’log’); subplot(1,4,1),imshow(I); subplot(1,4,2),imshow(J1); subplot(1,4,3),imshow(J2); subplot(1,4,4),imshow(J3); 5图像反转 close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg); J=double(I); J=-J+(256-1); H=uint8(J); subplot(1,2,1),imshow(I); subplot(1,2,2),imshow(H); 6灰度线性变换 close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg) subplot(2,2,1),imshow(I); title(原始图像); axis on; I1=rgb2gray(I); subplot(2,2,2),imshow(I1); title(灰度图像); axis on; J=imadjust(I1,[0.1 0.5],[]); subplot(2,2,3),imshow(J); title(线性变换图像[0.1 0.5]); grid on axis on K=imadjust(I1,[0.3 0.7],[]); subplot(2,2,4),imshow(K); title(线性变换图像[0.3 0.7]); grid on; axis on 7非线性变换 close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg); subplot(2,2,1),imshow(I); title(原始图像) I1=rgb2gray(I);clear subplot(2,2,2),imshow(I1); title( 灰度图像); grid on; axis on; J=double(I1); J=40*(log(J+1)); H=uint8(J); subplot(2,2,3),imshow(H); title( 对数变换图像); grid on; axis on; 8直方图均衡化 close all I=imread(C:\Documents and Settings\Administrator\桌面\图片\2.jpg); subplot(2,2,1),imshow(I); title( 灰度图像); I=rgb2gray(I); subplot(2,2,1); imshow(I); subplot(2,2,2); imhist(I); I1=histeq(I); subplot(2,2,3);