Help for setting the formatSpec

Hi everyone,

I'm trying to read a picture file and get the size of the picture and print it to txt file. I want it like:

size img1.png

2448 3264 3

size img2.png

2458 3464 3

........

But i don't know how to do it, please help me with the code.

Here my code:

for k = 1: length(jpgFiles)
    baseFileName = jpgFiles(k).name;
    fullFileName = fullfile(Folder, baseFileName);
    fprintf(1, 'Reading %s\n', fullFileName);
    imageArray = imread(fullFileName);
    E=size(imageArray);
    fid=fopen('Result.txt','a');
    fprintf(fid,'%.d\n',E);
    fclose(fid);

Thank you very much!

Answer 1

[Jan]

 fprintf(fid,'%d     %d     %d\n', E); 

It is much faster to open the file once only:

 fid = fopen('Result.txt','a');
 for k = 1:length(jpgFiles)
    baseFileName = jpgFiles(k).name;
    fullFileName = fullfile(Folder, baseFileName);
    fprintf(1, 'Reading %s\n', fullFileName);
    imageArray = imread(fullFileName);
    E = size(imageArray)   
    fprintf(fid, 'size %s\n', baseFileName);  % [EDITED]
    fprintf(fid, '%d     %d     %d\n', E);
 end
 fclose(fid);

[Hong Thien Dang]

That nice! But do you know how to put the title for each data like this:

size img1.png

2448 3264 3

Thanks!!!

[Hong Thien Dang]

@Jan

[Jan]

I've expanded the code in my answer.