How to read images from folder, divide each image and store it in new folder serially - matlab

Question

I am taking images from folder('E:\cicila\ME PROJECT\ME 4 SEM\brodatz\IMAGES TAKEN\TRY) Images are stored as 1. gif , 2.gif , and so on
I am dividing it . I want to store these images with new name . eg image taken is 1.gif
after diving it into 4 parts, I want to name these new images as 1. gif , 2.gif , 3.gif , 4.gif
Please help me . I have tried my code but it shows the error :
Error in feb11try (line 25)
Img1(i,j) = NewImage(startr+i, startc+j);
Code is :
clc;
close all;
clear all;
srcFiles = dir('E:\cicila\ME PROJECT\ME 4 SEM\brodatz\IMAGES TAKEN\TRY\*.gif'); % the folder in which ur images exists
%Taking the image from the given URL, it could have been the name of the file with extension if the root folder
n =2; %defining the number of rows
m =2; %defining the number of columns
for c = 1 : length(srcFiles)
NewImage = 'newimage.gif'; %granting permission to create a file and write in it
rf = floor(512/n); %generating the number of row pixels in the new file
cf = floor(512/m); %generating the number of row pixels in the new file
for v = 1:n
for s = 1:m %nXm files need to be made
startr = (v-1)*rf;
startc = (s-1)*cf;
for i = 1 : rf
for j = 1 : cf
Img1(i,j) = NewImage(startr+i, startc+j);
end
end
imwrite( NewImage,'c.gif');
end
end
end

Answer 1

You need to use imread() to read in the source image rather than treating the filename as an image. Based on what you have, I assume your image is single channel. I also made the assumption that your image is unsigned int. Also, keep in mind there are much faster ways to perform this using indexing.
I made a few changes to your sample that should get the job done under these assumptions. This is untested.
clc;
close all;
clear all;
srcFiles = dir('E:\cicila\ME PROJECT\ME 4 SEM\brodatz\IMAGES TAKEN\TRY\*.gif');
n = 2; %defining the number of rows
m = 2; %defining the number of columns
count = 0;
for c = 1 : length(srcFiles)
srcFilename = ['E:\cicila\ME PROJECT\ME 4 SEM\brodatz\IMAGES TAKEN\TRY\' srcFiles(c).name];
srcImg = imread(srcFilename); % Read source image
[~,srcName] = fileparts(srcFilename);
rf = floor(512/n); %generating the number of row pixels in the new file
cf = floor(512/m); %generating the number of row pixels in the new file
% initialize output image
destImg = uint8(zeros(rf,cf));
for v = 1:n
for s = 1:m %nXm files need to be made
startr = (v-1)*rf;
startc = (s-1)*cf;
for i = 1 : rf
for j = 1 : cf
destImg(i,j) = srcImg(startr+i, startc+j);
end
end
count = count + 1;
imwrite( destImg, sprintf('%d.gif', count) );
end
end
end