Original image size 769*770, I am geting error as dimension mismatch

Question

vetri veeran 2014-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/164019-original-image-size-769-770-i-am-geting-error-as-dimension-mismatch

回答： Jan 2014-11-24

采纳的回答： Jan

Original image size 769*770

org_im=imread('picture1.jpg');

[rows,columns,numberofcolorbands]=size(org_im)

if numberofcolorbands >1 org_im=org_im(:,:,2); end

org_im=im2double(org_im);

figure(1); imshow(org_im);title('Original Image')

f=zeros(771,772); [m,n]=size(f); f(769,770)=size(org_im);

I am getting an error as,

Subscripted assignment dimension mismatch.

Error in sobelmaskspat_d (line 23) f(769,770)=size(org_im);

How to overcome this,

please help me.

Thank you

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Jan 2014-11-24

Please post the complete error message.

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Answer 1

Jan 2014-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/164019-original-image-size-769-770-i-am-geting-error-as-dimension-mismatch#answer_160001

在 MATLAB Online 中打开

f(769,770) = size(org_im);

The right hand side replies a vector, but the left hand side is one element of a matrix, a scalar. We cannot guess what this line should do. So please explain this detail.

If you want to pad a matrix by zeros:

f = zeros(771,772);
f(2:770, 2:771) = org_im;

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Answer 2

Guillaume 2014-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/164019-original-image-size-769-770-i-am-geting-error-as-dimension-mismatch#answer_159995

What are you trying to do with that line anyway?

size(org_im) is at least a 1x2 array, possibly a 1x3 array if you have colour channels. You're trying to store that array in the single element at (769, 770) of f. Since you can only put one value there, it's never going to work.

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vetri veeran 2014-11-24

my original image size is 769*770

I created an array with zeros as

f=zeros(771,772);

In the newly created zero padded array ie) in 771*772, I want to place image 769*770.

How can i achieve this.

Thank you

Guillaume 2014-11-24

在 MATLAB Online 中打开

f = zeros(size(org_im) + 2); %no need to hardcode the size
f(2:end-1, 2:end-1) = org_im;

Or, if you have the image processing toolbox, use padarray

f = padarray(org_im, [1 1]);

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