Importing multiple image files (DSC0###) in a loop?

I'm trying to import 10-100 image files with imread to resize with imresize, and save them under a new name with imwrite in MATLAB.

I got the variable picfile to be assigned to the exact file name on my memory card, but am having trouble getting imread to accept the variable's contents

Error using imread>get_full_filename (line 516) File "picfile" does not exist.

I think MATLAB is searching my memory card for something like ' picfile.jpg' when I want it to look for ' DSC0345.jpg'

fprintf('THIS WILL ONLY WORK FOR PICTURE FILE NAMES STARTING WITH DSC0\n')
firstpic=input('Complete the first picture''s filename: DSC0');
    picname(1)=firstpic;
    dsc='DSC0';
numpics=input('How many sample pictures are in this project? ');

for i=2:1:numpics
    picname(i)=firstpic+i;
    picfile = sprintf('DSC0%0.0f.jpg',picname(i));
    imshow('picfile')
end

Answer 1

[Geoff Hayes]

Tessa - you could try using sprintf to create your file names

 for k=1:100
    filename = sprintf('DSC%03d.png',k);
    % now load file
 end

Note how we use the %03d so that up to two zeros will be used (preprended to the integer k) when creating the filename.

[Tessa Klein]

Thanks Geoff.. I've updated my code with sprintf but I get the error that my filename does not exist.

Error using imread>get_full_filename (line 516) File "picfile" does not exist.

I think MATLAB is searching my memory card for something like ' picfile.jpg' when I want it to look for ' DSC0345.jpg'

fprintf('THIS WILL ONLY WORK FOR PICTURE FILE NAMES STARTING WITH DSC0\n')
firstpic=input('Complete the first picture''s filename: DSC0');
    picname(1)=firstpic;
    dsc='DSC0';
numpics=input('How many sample pictures are in this project? ');

for i=2:1:numpics
    picname(i)=firstpic+i;
    picfile = sprintf('DSC0%0.0f.jpg',picname(i));
    imshow('picfile')
end

[Jan]

No, Matlab does not search for "picfile.jpg", but you instructed it clearly to search for "DSC0%d.jpg". Either you are in the wrong folder, or the file name does not exist. Solution: 1. use absolute paths and check the existence of the file:

folder = 'E:\';   % Adjust this
for k = 2:numpics
  picfile = fullfile(folder, sprintf('DSC0%d.jpg', firstpic + k));
  if exist(picfile, 'file')
    imshow('picfile')
  else
     fprintf(2, 'Missing file: %s\n', picfile);
  end
end

Maybe the files are called "DSC00003.jpg" etc? Then:

picfile = fullfile(folder, sprintf('DSC%05d.jpg', firstpic + k));

as Geoff has suggested already. This inserts the required number of zeros automatically.