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CStats:Rank
The Rank method computes the rank percentile value inside a rectangular region of the image. The rectangle and image must have been previously initialized for the CStats object.
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nValue, Sdev = CStats:Rank( nPercentile ) |
nPercentile is a number in the range 0 through
100.
On success,
returns the percentile value as a number.
On success, the
second returned argument, Sdev, is the
standard deviation about nValue.
On failure,
returns 0, 0.
Suppose a CImage named I and a CRect named R exist. The following script fragment returns the value for rank percentile 32.5 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 measure |
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nVal = S:Rank( 32.5 ) |
-- returns the value at the 32.5 percentile |
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Printf("rankval=%lg\n", nVal) |
-- list the results |
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S:delete() |
-- when done with S, remove it from memory |