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Error in blkproc function

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Jagadeesh p
Jagadeesh p 2012-2-12
the following code is used by me
y=imread('index.jpg');
b=blkproc(y,[2 2],@(x)min(min(x)));
whos b
It reports An error:
??? Subscripted assignment dimension mismatch.
Error in ==> blkproc at 89
aa(border(1)+(1:ma),border(2)+(1:na)) = a;
Error in ==> prog1 at 3
b=blkproc(y,[2 2],@(x)min(min(x)));
I am unable to get rid of that error.. PLS help me

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Walter Roberson
Walter Roberson 2012-2-12
Please check whether your "y" is 2 dimensional (a grayscale image) or 3 dimensional (a truecolor image).
JPEG files cannot store indexed images so we know that y cannot be 2 dimensional representing color.
If y is 3 dimensional then your min(min()) is going to return a vector rather than a scalar.
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Walter Roberson
Walter Roberson 2012-2-13
b=blkproc(y,[2 2],@(x)min(x(:));

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