Image1=imread('peppers.jpg');%单引号直接读取当前文件夹的文件
%红绿通道互换Image2=Image1;
Image2(:,:,1)=Image1(:,:,2);
Image2(:,:,2)=Image1(:,:,1);
imshow(Image2); imwrite(Image2,'changecolor.jpg');
%灰度化gray=rgb2gray(Image1); figure；
subplot(121),imshow(Image1),title('Original Image'); subplot(122),imshow(gray),title('Gray Image'); imwrite(gray,'grayimage.jpg');
% 图 像 旋 转 Newgray1=imrotate(gray,15); Newgray2=imrotate(gray,15,'bilinear'); figure;
subplot(121),imshow(Newgray1),title('旋转15°（最邻近插值）'); subplot(122),imshow(Newgray2),title('旋转15°（双线性插值）'); imwrite(Newgray1,'rotate1.jpg'); imwrite(Newgray2,'rotate2.jpg');
%图像缩放Newgray3=imresize(gray,2.5,'nearest'); Newgray4=imresize(gray,2.5,'bilinear'); figure;
subplot(121),imshow(Newgray3),title('放大2.5倍（最邻近插值）'); subplot(122),imshow(Newgray4),title('放大2.5倍（双线性插值）'); imwrite(Newgray3,'scale1.jpg');
imwrite(Newgray4,'scale2.jpg');
%图像镜像与拼接Image2=imread('lotus.bmp'); HImage=flipdim(Image2,2); VImage=flipdim(Image2,1); CImage=flipdim(HImage,1); [h w]=size(Image2); NewImage=zeros(h*2,w*2,3);
NewImage=[Image2 HImage;VImage CImage];
figure,imshow(NewImage);
imwrite(NewImage,'newlotus.jpg');