MATLAB script that splits an image into blocks/tiles.

Split_Image.m

clf;
Image = imread("peppers.png");
[Image_Height,Image_Width,Number_Of_Colour_Channels] = size(Image);

Block_Size = 50;
Number_Of_Blocks_Vertically = ceil(Image_Height/Block_Size);
Number_Of_Blocks_Horizontally = ceil(Image_Width/Block_Size);
Image_Blocks = struct('Blocks',[]);

Index = 1;
for Row = 1: +Block_Size: Number_Of_Blocks_Vertically*Block_Size
    for Column = 1: +Block_Size: Number_Of_Blocks_Horizontally*Block_Size
        
    Row_End = Row + Block_Size - 1;
    Column_End = Column + Block_Size - 1;
        
    if Row_End > Image_Height
       Row_End = Image_Height;
    end
    
    if Column_End > Image_Width
       Column_End = Image_Width;
    end
    
    Temporary_Tile = Image(Row:Row_End,Column:Column_End,:);
    
    %Storing blocks/tiles in structure for later use%
    Image_Blocks(Index).Blocks = Temporary_Tile;
    subplot(Number_Of_Blocks_Vertically,Number_Of_Blocks_Horizontally,Index); imshow(Temporary_Tile);
    Index = Index + 1;
    
    end  
end

%***************************************************%
%Uncomment to save the images to seperate .jpg files%
%***************************************************%
% for Block_Index = 1: length(Image_Blocks)
%     imwrite(Image_Blocks(Block_Index).Blocks,"Block" + num2str(Block_Index) + ".jpg"); 
% end

Split_Image_And_Reconstruct.m

clf;
Image = imread("peppers.png");
[Image_Height,Image_Width,Number_Of_Colour_Channels] = size(Image);

Block_Size = 50;
Number_Of_Blocks_Vertically = ceil(Image_Height/Block_Size);
Number_Of_Blocks_Horizontally = ceil(Image_Width/Block_Size);
Image_Blocks = struct('Blocks',[]);

Index = 1;
for Row = 1: +Block_Size: Number_Of_Blocks_Vertically*Block_Size
    for Column = 1: +Block_Size: Number_Of_Blocks_Horizontally*Block_Size
        
    Row_End = Row + Block_Size - 1;
    Column_End = Column + Block_Size - 1;
        
    if Row_End > Image_Height
       Row_End = Image_Height;
    end
    
    if Column_End > Image_Width
       Column_End = Image_Width;
    end
    
    Temporary_Tile = Image(Row:Row_End,Column:Column_End,:);
    
    %Storing blocks/tiles in structure for later use%
    Image_Blocks(Index).Blocks = Temporary_Tile;
%     subplot(Number_Of_Blocks_Vertically,Number_Of_Blocks_Horizontally,Index); imshow(Temporary_Tile);
    Index = Index + 1;
    
    end  
end

%*************************************************************************%
%MODIFYING THE BLOCKS%
%*************************************************************************%

for Block_Index = 1: length(Image_Blocks)
    if(mod(Block_Index,2) == 0)
        %Darkening every other block%
        Image_Blocks(Block_Index).Blocks = 0.5.*(Image_Blocks(Block_Index).Blocks);
    end
end

%*************************************************************************%
%RECONSTRUCTING THE IMAGE%
%*************************************************************************%

Reconstructed_Image = zeros(size(Image));

Block_Index = 1; 
for Row = 1: +Block_Size: Image_Height
    for Column = 1: +Block_Size: Image_Width
        
        Height_Of_Block = size(Image_Blocks(Block_Index).Blocks,1);
        Width_Of_Block = size(Image_Blocks(Block_Index).Blocks,2);
        Reconstructed_Image(Row:Row+Height_Of_Block-1,Column:Column+Width_Of_Block-1,:) = Image_Blocks(Block_Index).Blocks;
        Block_Index = Block_Index + 1;

    end  
end

imshow(uint8(Reconstructed_Image));

Split_Image_Truncated.m

clf;
Image = imread("peppers.png");
[Image_Height,Image_Width,Number_Of_Colour_Channels] = size(Image);

Block_Size = 50;
Number_Of_Blocks_Vertically = floor(Image_Height/Block_Size);
Number_Of_Blocks_Horizontally = floor(Image_Width/Block_Size);
Image_Blocks = struct('Blocks',[]);

Index = 1;
for Row = 1: +Block_Size: Number_Of_Blocks_Vertically*Block_Size
    for Column = 1: +Block_Size: Number_Of_Blocks_Horizontally*Block_Size
        
    Row_End = Row + Block_Size - 1;
    Column_End = Column + Block_Size - 1;
        
    if Row_End > Image_Height
       Row_End = Image_Height;
    end
    
    if Column_End > Image_Width
       Column_End = Image_Width;
    end
    
    Temporary_Tile = Image(Row:Row_End,Column:Column_End,:);
    
    %Storing blocks/tiles in structure for later use%
    Image_Blocks(Index).Blocks = Temporary_Tile;
    subplot(Number_Of_Blocks_Vertically,Number_Of_Blocks_Horizontally,Index); imshow(Temporary_Tile);
    Index = Index + 1;
    
    end  
end

%***************************************************%
%Uncomment to save the images to seperate .jpg files%
%***************************************************%
% for Block_Index = 1: length(Image_Blocks)
%     imwrite(Image_Blocks(Block_Index).Blocks,"Block" + num2str(Block_Index) + ".jpg"); 
% end

Splitting_Multiple_Images.m

%Getting all the images in the directory%
Folder_Directory = "";
File_Type = "png";
Images = dir(fullfile(Folder_Directory,"*." + File_Type));

for Image_Index = 1: length(Images)
    Image_Name = Images(Image_Index).name;
    Image = imread(fullfile(Folder_Directory,Image_Name));
    File_Prefix = strsplit(Image_Name,".");
    File_Prefix = File_Prefix{1};
    [Image_Height,Image_Width,Number_Of_Colour_Channels] = size(Image);

    Block_Size = 100;
    Number_Of_Blocks_Vertically = floor(Image_Height/Block_Size);
    Number_Of_Blocks_Horizontally = floor(Image_Width/Block_Size);
    Image_Blocks = struct('Blocks',[]);
    Index = 1;
    for Row = 1: +Block_Size: Number_Of_Blocks_Vertically*Block_Size
        for Column = 1: +Block_Size: Number_Of_Blocks_Horizontally*Block_Size

        Row_End = Row + Block_Size - 1;
        Column_End = Column + Block_Size - 1;

        if Row_End > Image_Height
           Row_End = Image_Height;
        end

        if Column_End > Image_Width
           Column_End = Image_Width;
        end

        Temporary_Tile = Image(Row:Row_End,Column:Column_End,:);

        %Storing blocks/tiles in structure for later use%
        Image_Blocks(Index).Blocks = Temporary_Tile;
%         subplot(Number_Of_Blocks_Vertically,Number_Of_Blocks_Horizontally,Index); imshow(Temporary_Tile);
        Index = Index + 1;

        end  
    end

    mkdir(File_Prefix + "_Blocked/");
    for Block_Index = 1: length(Image_Blocks)
        imwrite(Image_Blocks(Block_Index).Blocks,fullfile(File_Prefix + "_Blocked/",File_Prefix + "_" + num2str(Block_Index) + ".jpg")); 
    end
end

I have already tried it sir, but still can't work. Does the version of Matlab affect sir? btw, I use Matlab 2018a @MichaelTr7

@febbyftrp I don’t believe the version of MATLAB should have any effect on this. Is it possible to just load an image from that directory/folder using the imread() function?

Use the Split_Image_And_Reconstruct.m to modify and reconstruct the image blocks.