Loop for reading of Images

Hi friends.

I want to construct a matlab-code that some images, can be read and concluded. I write this code and need to change it in the form of LOOP pattern.

can enyone helpe or guide me?

Type= {['T1'],['T2'],['T3]};
    TType = menu('Choose a  types of weave :',' T1 ',' T2 ',' T3')
    if Type==1
    W=[1 1 1 ; 0 1 0 ; 0 0 1];
    elseif  WeaveType==2
        W=[0 0 1 ; 0 0 0 ; 1 0 0];
    elseif  WeaveType==3
        W=[0 1 1 ; 1 1 0 ; 1 0 1];
    end
    A1=imread('C:\Users\User\My Documents\MATLAB\1\new1.png');
    A2=imread('C:\Users\User\My Documents\MATLAB\1\new2.png'); 
    A3=imread('C:\Users\User\My Documents\MATLAB\1\new3.png'); 
    A4=imread('C:\Users\User\My Documents\MATLAB\1\new4.png');
    A5=imread('C:\Users\User\My Documents\MATLAB\1\new5.png');
    A6=imread('C:\Users\User\My Documents\MATLAB\1\new6.png');
    A7=imread('C:\Users\User\My Documents\MATLAB\1\new7.png');
    A8=imread('C:\Users\User\My Documents\MATLAB\1\new8.png');
    A9=imread('C:\Users\User\My Documents\MATLAB\1\new9.png');
    
    B1=imread('C:\Users\User\My Documents\MATLAB\2\new1.png');
    B2=imread('C:\Users\User\My Documents\MATLAB\2\new2.png'); 
    B3=imread('C:\Users\User\My Documents\MATLAB\2\new3.png'); 
    B4=imread('C:\Users\User\My Documents\MATLAB\2\new4.png');
    B5=imread('C:\Users\User\My Documents\MATLAB\2\new5.png');
    B6=imread('C:\Users\User\My Documents\MATLAB\2\new6.png');
    B7=imread('C:\Users\User\My Documents\MATLAB\2\new7.png');
    B8=imread('C:\Users\User\My Documents\MATLAB\2\new8.png');
    B9=imread('C:\Users\User\My Documents\MATLAB\2\new9.png');
    if W(1,1)==0 
        T1=imrotate(A1,90);
    else T1=B1;
    end
    if W(1,2)==0 
        T2=imrotate(A2,90);
    else T2=B2;
    end
    if W(1,3)==0 
        T3=imrotate(A3,90);
    else T3=B3;
    end
    if W(2,1)==0 
        T4=imrotate(A4,90);
    else T4=B4;
    end
    if W(2,2)==0 
        T5=imrotate(A5,90);
    else T5=B5;
    end
    if W(2,3)==0 
        T6=imrotate(A6,90);
    else T6=B6;
    end
    if W(3,1)==0 
        T7=imrotate(A7,90);
    else T7=B7;
    end
    if W(3,2)==0 
        T8=imrotate(A8,90);
    else T8=B8;
    end
    if W(3,3)==0 
        T9=imrotate(A9,90);
    else T9=B9;
    end 
    Final=[T1 T2 T3 ; T4 T5 T6 ; T7 T8 T9];
    imshow(Final);

Answer 1

[Aastha]

Hi @Zarrin,

I understand you are looking to optimize your MATLAB code and restructure it using loops. You may refer to the following steps to achieve this:

1. In the existing code, the image file paths for the variables "A" and "B" follow a pattern from "1/new1", "1/new2", ..., "1/new9" and similarly "2/new1", ..., "2/new9".

2. You can use the "cell" function in MATLAB to create a cell array of size 9. Then, use string concatenation along with the "num2str" function inside a for loop to dynamically read and store the "A" and "B" images. Below is a sample MATLAB code snippet demonstrating this:

A = cell(9,1);
for i = 1:9
   A{i} = imread(['C:\Users\User\My Documents\MATLAB\1\new' num2str(i) '.png']);
end

For more information on the "cell" and "num2str" functions, please refer to the following MathWorks documentation links:

• cell: https://www.mathworks.com/help/matlab/ref/cell.html
• num2str: https://www.mathworks.com/help/matlab/ref/num2str.html

I hope this helps!

[Walter Roberson]

These days you can use

   A{i} = imread("C:\Users\User\My Documents\MATLAB\1\new" + i + ".png");

but I suggest

   projectdir = "C:\Users\User\My Documents\MATLAB";
   %..
   pd1 = fullfile(projectdir, "1");
   %...
   A{i} = imread( fullfile(pd1, "new" + i + ".png") );