dividing each block of each imge into sub_blocks

hello,i want to dividing set of images into blocks and then divide each block into 9 sub_blocks,also i want to save each blocks for each image in sparate array,how can work this please???

i have this code for dividing into blocks

a=157;
b=300;
scr=dir('C:\users\hp\Desktop\dataset\*.jpg');

for i=1:length(scr)
f=strcat('C:\users\hp\Desktop\dataset\',scr(i).name);
j=imread(f);
jj=imresize(j,[628,1200]);
figure,imshow(a);
path=strcat('C:\users\hp\Desktop\dataset\',scr(i).name);
g=mat2cell(jj,[a a a a],[b b b b],3);


for i=1:16
   subplot(4,4,i),imshow(g{i});
end

Answer 1

[Image Analyst]

Too many problems to explain them all (like showing "a", using path as a new variable, not checking for gray scale images, not looping over all rows and columns of "g", etc.). Just try this instead:

% Demo by Image Analyst
% Initialization Steps.
clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;
a=157;
b=300;
fileList = dir('*.jpg');
for k = 1 : length(fileList)
    thisFileName = fullfile(fileList(k).folder,fileList(k).name);
    thisImageOriginal = imread(thisFileName);
    [rows, columns, numberOfColorChannels] = size(thisImageOriginal);
    if numberOfColorChannels < 3
        % Skip gray scale images or you'll get an error.
        continue;
    end
    resizedImage = imresize(thisImageOriginal, [628,1200]);
    g = mat2cell(resizedImage, [a a a a], [b b b b], 3);
    [rowsg, colsg] = size(g);
    counter = 1;
    for row = 1 : rowsg
        for col = 1 : colsg
            subplot(rowsg, colsg, counter);
            imshow(g{row, col});
            counter = counter + 1;
        end
    end
    sgtitle(fileList(k).name, 'FontSize', 16, 'Interpreter', 'none'); % Only in R2018b or later.
    promptMessage = sprintf('Do you want to Continue processing,\nor Quit processing?');
    titleBarCaption = 'Continue?';
    buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
    if contains(buttonText, 'Quit', 'IgnoreCase', true)
        return; % or break or continue.
    end
end

[Hadeel]

ok, thanks alot

[Image Analyst]

Looks like no more answers are going to come in. What exactly about my answer is unacceptable? I'm not sure what you mean when you say 9 blocks since your attempt at code seemed to try to create 16 blocks. Maybe you could give a screenshot of what you'd prefer instead of this.

[Hadeel]

iam want for dividing dataset of images,each image in it into 16 blocks and then each divided block into 9 subblocks.