在文件夹中保存多个具有不同名称的图像

Question

我正在尝试从一个文件夹中读取图像并将新图像以不同的名称保存在不同的文件夹中。我需要它们的名称不同，因为它们是用不同的 affine2d 值生成的。例如 a1 文件夹中的图像将是 aa1,aa2,aa3,aa4,aa5.... 而 a2 文件夹中的图像将是 bb1,bb2,bb3.... 有什么办法吗？

'''

srcFiles = dir('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\*.jpg'); 
for i = 1 : length(srcFiles)
filename = strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\',srcFiles(i).name);
im = imread(filename);
aform = affine2d([1 0 0; .1 1 0; 0 0 1])
bform = affine2d([1 0 0; .2 1 0; 0 0 1])
cform = affine2d([1 0 0; .3 1 0; 0 0 1])
dform = affine2d([1 0 0; .4 1 0; 0 0 1])
eform = affine2d([1 0 0; .5 1 0; 0 0 1])
fform = affine2d([1 0 0; .6 1 0; 0 0 1])
gform = affine2d([1 0 0; .7 1 0; 0 0 1])
hform = affine2d([1 0 0; .8 1 0; 0 0 1])
jform = affine2d([1 0 0; .9 1 0; 0 0 1])
a = imwarp(im,aform);
b = imwarp(im,bform);
c = imwarp(im,cform);
d = imwarp(im,dform);
e = imwarp(im,eform);
f = imwarp(im,fform);
g = imwarp(im,gform);
h = imwarp(im,hform);
j = imwarp(im,jform);
newfilename=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a1\',srcFiles(i).name);
newfilename1=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a2\',srcFiles(i).name);
newfilename2=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a3\',srcFiles(i).name);
newfilename3=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a4\',srcFiles(i).name);
newfilename4=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a5\',srcFiles(i).name);
newfilename5=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a6\',srcFiles(i).name);
newfilename6=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a7\',srcFiles(i).name);
newfilename7=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a8\',srcFiles(i).name);
newfilename8=strcat('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\a9\',srcFiles(i).name);
imwrite(a,newfilename,'jpg');
imwrite(b,newfilename1,'jpg');
imwrite(c,newfilename2,'jpg');
imwrite(d,newfilename3,'jpg');
imwrite(e,newfilename4,'jpg');
imwrite(f,newfilename5,'jpg');
imwrite(g,newfilename6,'jpg');
imwrite(h,newfilename7,'jpg');
imwrite(j,newfilename8,'jpg');
end 

'''

Answer 1

我不太确定您的要求是什么，但我觉得，如果您在外观和更复杂的结构上考虑更多，您的代码可能会更加自动化（尽管我现在只使用 3D 矩阵；））

% build a 3D matrix to store all transformation matrices
Mat = cat(3,[1 0 0; .1 1 0; 0 0 1],...
            [1 0 0; .2 1 0; 0 0 1],...
            [1 0 0; .3 1 0; 0 0 1],...
            [1 0 0; .4 1 0; 0 0 1],...
            [1 0 0; .5 1 0; 0 0 1],...
            [1 0 0; .6 1 0; 0 0 1],...
            [1 0 0; .7 1 0; 0 0 1],...
            [1 0 0; .8 1 0; 0 0 1],...
            [1 0 0; .9 1 0; 0 0 1]);
srcFiles = dir('C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1\*.jpg'); 
for i = 1:length(srcFiles)
    % load file (use fullfile() + the path from the list to make this
    % generic for every platform)
    path2img = fullfile(srcFiles(i).folder,srcFiles(i).name);
    % read image
    img = imread(path2img);
    for j = 1:size(Mat,3)
        % transform image
        form = affine2d(Mat(:,:,j));
        img_trf = imwarp(img,form);

        %% save image
        % folder name
        fldrNm = num2str(j,'a%d');
        path2fldr = fullfile(srcFiles(i).folder,fldrNm);
        % create new folder if it does not exist yet
        if i == 1 && exist(path2fldr,'dir') ~=7
            mkdir(path2fldr)
        end

        path2save = fullfile(path2fldrsrcFiles(i).name);
        % store new image
        imwrite(img_trf,path2save,'jpg');
    end
end 

事实上，如果你的转换矩阵遵循这种模式，你甚至可以自动生成它：

% allocate memory
NumMat = 100;
Mat = NaN(3,3,NumMat);
for i = 1:NumMat
   Mat(:,:,i) = [1 0 0; i/10 1 0; 0 0 1];
end

如果你想节省最少的时间，你可以提前到affine2d，但这需要将它保存到结构数组或单元数组，我不知道你是否已经到这一步了;)

Answer 2

听起来是使用循环的完美场所。

rootdir='C:\Users\mstfy\Desktop\Matlab\alex\Train1\Person1';
srcFiles = dir([rootdir filesep '*.jpg']); 
for i = 1 : length(srcFiles)
    filename = [rootdir filesep srcFiles(i).name];
    im = imread(filename);
    for j=1:9
        xform = affine2d([1 0 0; .1*j 1 0; 0 0 1]);
        newim = imwarp(im,xform);
        newfilename= [rootdir filesep sprintf('a%d',j) filesep srcFiles(i).name];
        imwrite(newim,newfilename,'jpg');
    end
end