what does this code mean?

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satish thapaliya
satish thapaliya 2012-11-20
1/(mean(mean(I1(xy_index(2)+(-7:7),xy_index(1)+(-7:7),1)))/mean(mean(I2(xy_index(2)+(-7:7),xy_index(1)+(-7:7),1))))

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satish thapaliya
satish thapaliya 2012-11-20
Thanks Roberson

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Matt Fig
Matt Fig 2012-11-20
编辑：Matt Fig 2012-11-20
It appears to be finding the ratio of the mean values of two 15 element square subarrays, each from a different array.
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Walter Roberson
Walter Roberson 2012-11-20
It is not a gray scale value. It is "something else".
It does not produce a value between 0 and 1: it can produce infinity in some cases.
The expression is of the form 1 / (A / B) . That could be rewritten as B/A, which makes it clearer that what it produces is a ratio of the grayscale intensities of the mean color of the respective two blocks.

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