speeding up tiff writing

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Jeff Spector 2019-7-30

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https://ww2.mathworks.cn/matlabcentral/answers/474180-speeding-up-tiff-writing

评论： Walter Roberson 2019-7-31

I'm trying to write a large (~18,000) frame image stack to a tiff file. See code below :

 imgname=[SubDataFolder,...
            '/_BG_',num2str(0),'_BGstd_',num2str(0),'_kappa',num2str(kappa),'_run_',num2str(runNum),'.tiff']; % 0 just sets the image name
        imwrite(uint16(BgIm160(:, :,1)),imgname); % - writes the first image
        disp(['Starting Image Writing Loop for ',imgname]) % - for trouble shooting
        for(k=2:num_images) % - writes the rest of the images
            imwrite(uint16(BgIm160(:, :, k)),imgname,'WriteMode','append');
             fracdone=round((k./num_images)*100) % - shows hoe much is done
%         
        end
        

This is taking a REALLY long time, is it just becuase 18k slices is a lot to write in a file (each slice is 200x500), and I just need to be patient, or is there a better/faster way to write this to a .tif file (for later analysis in ImageJ)

thanks

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Jeff Spector 2019-7-31

I've looked but can't find a good example of using TIff to write a multipage tiff file. I've got several CPUs on this machine, could I do this with the parallel computing toolbox's parfor loop to speed it up, or will it write the images in the wrong order?