Selecting all pixels except one pixel
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Say that we have a 3x3 matrix. If we type x(:), this will select all the elements in the matrix, right?
How can we select all the elecments except element x(2,2)? What should we type in this case?
Thanks.
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Image Analyst
2013년 5월 23일
What are you doing? Because if you're doing something like linear filtering via convolution or morphological filtering, you would do this be proper selection of the kernel.
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Iain
2013년 5월 23일
You need to use linear or logical indexing to do that. In this case, linear would be easier:
The indices for a 3x3 are:
[1 4 7;
2 5 8;
3 6 9];
So you can access it via x([1:(1 before the one you don't want) (1 after the one you don't want:end]), so for your example:
x([1:4 6:9]);
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