Dear all,
I found discrepancy codes between getStatistics() and calculateMoments() in FloatStatistics.java
In getStatistics function, mean (also called the first-order moment) is calculated in the range of histMin/Max and min/maxTreshold. On the other hand, in cacluateMoments function other higher order moments (variance, skewness, kurtosis) are calculated in the range of max/minThreshold. In addtion, those higher order-moments are calculated based on mean value which is limited by histMin/Max.
Is there any reason why you coded the source codes for two functions in this way?
Best regards,
Hidenao Yamada
calculateMoments()
> double mean2 = mean*mean;
> double variance = sum2/pixelCount - mean2;
> double sDeviation = Math.sqrt(variance);
> skewness = ((sum3 - 3.0*mean*sum2)/pixelCount + 2.0*mean*mean2)/(variance*sDeviation);
> kurtosis = (((sum4 - 4.0*mean*sum3 + 6.0*mean2*sum2)/pixelCount - 3.0*mean2*mean2)/(variance*variance)-3.0);
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