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CStats:MeanSdev
The MeanSdev method computes the mean value and standard deviation inside a rectangular region of the image. The rectangle and image must have been previously initialized for the CStats object.
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nMean, Sdev = CStats:MeanSdev() |
On success,
returns 2 numbers: the mean value and the standard deviation.
On failure,
returns 0, 0.
Suppose a CImage named I and a CRect named R exist. The following script fragment returns the mean and standard deviation inside a rectangle on the image:
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S = CStats:new() |
-- create a CStats object |
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S:Init( I, R ) |
-- specify CImage and CRect to be measured |
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nMean, nSdev = S:MeanSdev() |
-- returns the mean and standard deviation |
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Printf("mean=%lg,sdev=%lg\n", nMean, nSdev) |
-- list the results |
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S:delete() |
-- when done with S, remove it from memory |