Isaiah asked . 2020-11-03

Getting Index in position 1 exceeds arrray bound error

I wrote a MATLAB code which will put a black box of 10 pixels width at the center of image but I am getting error which says "Index in position 1 exceeds array bounds error"
Here is the code for same
 
image = imread('image.jpg');
[r,c]=size(image);
width=10;
color=6;
new_image=ones(r,c)*color;
new_image=uint8(new_image);
for row=1:r
    for column=1:(c-width)/2
        new_image(row,column)=image(row,column);
    end;
    for column=(c+width)/2:c
        new_image(row,column)=image(row,column);
    end;
end;
for column=1:c
    for row=1:(r-width)/2
        new_image(row,column)=image(row,column);
    end;
    for row=(r+width)/2:c
        new_image(row,column)=image(row,column);
    end;
end;
imshow(new_image);

And for the logic of the code this code makes a matrix of ones as the size of image pixels and after that I iterate the code from the matrix and adding the pixels value of original image to the new matrix where the box is not present.

matlab , image processing, array , matlab code

Expert Answer

Prashant Kumar answered . 2024-11-16 18:08:00

A better approach is to use indexing, eg.:

 

>> I = imread('peppers.png');
>> N = 10;
>> V = 1:N;
>> I(fix((end-N)/2)+V,fix((end-N)/2)+V,:) = 6;
>> imshow(I)

 


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