What does this refers to?

2012 9 20
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What does this symbol refers to? How it will be implemented? L(i,j), be an image.
|L(i,j)|||

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Jan
Jan 2012-9-20

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The double bars mean the norm. If L(i,j) is "an image", this norm is not uniquely defined and the meaning should be explained anywhere in the surrounding text.

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Wayne King
Wayne King 2012-9-20

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That is the norm. It is implemented in MATLAB with norm()
Without additional information, it is not clear which norm represents, i.e. the 2-norm, the 1-norm etc.

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