Change file names before saving

Question

no zoop 2019-10-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/486477-change-file-names-before-saving

评论： Louis-Philippe Guinard 2020-2-18

Hi,

I am cropping a several collaged images simulatonouesly. I am able to successfully crop the images but do not like how the file names are saved. Lets say I have two collages in my folder that I want to crop...I crop them but when I go to save them it saves them as IMG_001_001 to how many images are cropped from the first image and IMG_002_001 to how many images are cropped from the 2nd image. The amount of blobs are saved in array [152, 148]. So the total number of images being cropped is 300, how would I make it so when the images are saved it goes from IMG_001 to IMG_300?

%%
message = sprintf('Would you like to crop out and save each individual images?');
reply = questdlg(message, 'Extract Individual Images?', 'Yes', 'No', 'Yes');
% Note: reply will = '' for Upper right X, 'Yes' for Yes, and 'No' for No.
if strcmpi(reply, 'Yes')
   for n = 1 : original_images
       for k = 1 : numberOfBlobs(n)      
           thisBlobsBoundingBox  = blobMeasurements{n}(k).BoundingBox; 
           subImage = imcrop(OG_images{n}, thisBlobsBoundingBox);
           folder = 'C:/Users/Corey/Desktop/new zoop 2';
           thisBaseFileName = sprintf('Image%03d_%03d.tif', n, k); % I know i would take out %03d_%03d and the n and k
           % but how do I replace that or how do I the total numberOfBlobs
           thisFullFileName = fullfile(folder, thisBaseFileName);
           imwrite(subImage, thisFullFileName,'tif');   
       end
   end
end

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Answer 1

Image Analyst 2019-10-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/486477-change-file-names-before-saving#answer_397334

编辑：Image Analyst 2019-10-21

在 MATLAB Online 中打开

Try this:

%%
message = sprintf('Would you like to crop out and save each individual images?');
reply = questdlg(message, 'Extract Individual Images?', 'Yes', 'No', 'Yes');
% Note: reply will = '' for Upper right X, 'Yes' for Yes, and 'No' for No.
folder = 'C:/Users/Corey/Desktop/new zoop 2';
if strcmpi(reply, 'Yes')
   for n = 1 : original_images
           thisBlobsBoundingBox  = blobMeasurements{n}(k).BoundingBox; 
           subImage = imcrop(OG_images{n}, thisBlobsBoundingBox);
           thisBaseFileName = sprintf('Image%03d_%03d.tif', n, numberOfBlobs(n));
           % but how do I replace that or how do I the total numberOfBlobs
           thisFullFileName = fullfile(folder, thisBaseFileName);
           imwrite(subImage, thisFullFileName,'tif');   
   end
end

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Louis-Philippe Guinard 2020-2-14

在 MATLAB Online 中打开

Hello! I have a similar problem, so I think I can explain his problem another way (and get help in the process).

Basically I have several images (say, I = 10) in which I have many blobs (say, b = 50). My code may be a bit different from that of OP, but in my case I want to separate each blob, measure intensity levels for each blob, then plot some graphs for each individual blob and save each graph separately. This way, much like OP, I would like to have I*b = 500 graphs saved separately.

What he seems to want is to save as 'filename001.png' or something like that, through to 'filename500.png'. My issue is slightly different as I want to save my graphs as 'filename_image1_blob001.png' through to 'filename_image1_050.png', then again from 'filename_image2_001.png' and so on. My code somehow already deals with the name of the file up to 'filename_imageX' but for the last part, whatever I do ends up giving me a random number and overwriting again and again on that one last file, leaving me with only one graph at the end when I should have 50 (per image, that is).

My code is something like:

savefolder = 'some path for a folder'
save([savefolder,matfilelist(itmat).name(1:end-4),'_Results.mat'],'variable');
            savefig([savefolder,matfilelist(itmat).name(1:end-4),'_Figures.fig']);
            saveas(fig,[savefolder,matfilelist(itmat).name(1:end-4),'_Figures.png']);

I tried something like '_Figures', num2str('%03d', num2str(filenumber)), '.fig' but it didn't really work. I hope this clarifies a bit? Thanks in advance!

Stephen23 2020-2-15

编辑：Stephen23 2020-2-15

在 MATLAB Online 中打开

@Louis-Philippe Guinard:

Use fullfile to create the complete filename, rather than concatenating strings.
Use fileparts to remove file extension from a filename, rather than buggy indexing.
Read the num2str documentation, you current usage makes little sense. Or even better, use sprintf.

pnm = 'some path for a folder';
[~,fnm] = fileparts(matfilelist(itmat).name);
tmp = sprintf('%03d',filenumber);
save(        fullfile(pnm,[fnm,'_Results',tmp,'.mat']), 'variable');
savefig(fig, fullfile(pnm,[fnm,'_Figures',tmp,'.fig']));
saveas( fig, fullfile(pnm,[fnm,'_Figures',tmp,'.png']));

Louis-Philippe Guinard 2020-2-18

Come to think of it, I really did write that line weird... Thanks for the heads-up! And thanks for the save as-is, I tried what you sent me and now it works!

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