How to read multiple images from a folder where images have names like "3_nouvel-​obs_hbhnr3​00_constru​ctedPdf_No​uvelobs240​2PDF.clean​.png" , "7_nouvel-​obs_hbhnr3​00_constru​ctedPdf_No​uvelobs240​2PDF.clean​.png" and so on.

myfolder='G:\Matlab Code-IIITA\DATASETS\nouvel_obs_2402_clean-1.0\input';
pngfiles=dir(fullfile(myfolder,'\*_nouvel-obs_hbhnr300_constructedPdf_Nouvelobs2402PDF.clean.png'));   
%% Also tried this : pngfiles=dir(fullfile(myfolder,'\*png'));
for i = 1:5
    img{i} = imread(pngfiles(i).name);
end

Above code is giving error : Tried it on MATLAN R2018a:

I want to read the .png files present in a folder:

Error is

 Error using imread>get_full_filename (line 516)
File "100_nouvel-obs_hbhnr300_constructedPdf_Nouvelobs2402PDF.clean.png" does not exist.
Error in imread (line 340)
    fullname = get_full_filename(filename);
Error in trial (line 5)
    img{i} = imread(pngfiles(i).name);

But when i check for pngfiles(1).name i get the following output.

>> pngfiles(1).name

ans =

'100_nouvel-obs_hbhnr300_constructedPdf_Nouvelobs2402PDF.clean.png'

Why i am not able to read/ perform imshow to display images

[dpb]

I'm suspicious of the second dot in the filename--try renaming the file to something w/o that and see if it won't then work successfully.

Answer 1

[Srivardhan Gadila]

Hi,

The error is due to the input argument provided to the “imread” function. The input “pngfiles(i).name” which is equal to

“100_nouvel-obs_hbhnr300_constructedPdf_Nouvelobs2402PDF.clean.png'’ (for i=1 in your case) is not the complete path of the PNG image file you are trying to load.

It can work only in the following scenarios :

• The files are in the MATLAB’s path
• Or the current working directory contains the files which you are loading.

In all other cases provide the complete path of the image file to the “imread” function’s argument. ('G:\Matlab Code-IIITA\DATASETS\nouvel_obs_2402_clean-1.0\input\100_nouvel-obs_hbhnr300_constructedPdf_Nouvelobs2402PDF.clean.png')