Loop for reading of Images

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Zarrin
Zarrin 2021-1-13
编辑： Walter Roberson 2025-6-12
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);

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回答（1 个）

Aastha
Aastha 2025-6-12
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:
I hope this helps!
  1 个评论
Walter Roberson
Walter Roberson 2025-6-12
编辑：Walter Roberson 2025-6-12
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") );

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