How do I solve backslash issue in this case?

selpath = uigetdir;
imageFolder = dir(fullfile(selpath,'\\*.jpg'));
%imageFolder = dir('C:\Users\85042513\MATLAB\Projects\BAT CVE\Images\NG\*.jpg');
numfiles = length(imageFolder);
ori_roi = cell(numfiles, 1);
i = 1;
filename = strcat(selpath,imageFolder(i).name);
originalImage = imread(filename); %(line 42)

%% LOOP THROUGH ALL IMAGES IN THE FOLDER & RUN ALL THE 5 FUNCTIONS
for i=1:length(imageFolder)
    tic
        functionError = 0;
        
        filename = strcat(selpath,imageFolder(i).name);
        originalImage = imread(filename);
        ori_roi{i} = originalImage( rect(2) : (rect(2)+rect(4)) , rect(1) : (rect(1)+rect(3)) , : );
        
        ...
            

I have tried:

    imageFolder = dir(fullfile(selpath,'\*.jpg'));
    

It has the same issue.

Answer 1

[KSSV]

Replace this line:

filename = strcat(selpath,imageFolder(i).name);

with:

filename = fullfile(selpath,imageFolder(i).name);

If you are admant using strcat use:

filename = strcat(selpath,filesep,imageFolder(i).name);