Accord.Imaging.Filters.Kuwahara.min C# (CSharp) Method

        unsafe private static double min(
            double varA, double varB, double varC, double varD,
            double meanA, double meanB, double meanC, double meanD)
        {
            double varMin = varA;
            double mean = meanA;

            if (varB < varMin)
            {
                varMin = varB;
                mean = meanB;
            }

            if (varC < varMin)
            {
                varMin = varC;
                mean = meanC;
            }

            if (varD < varMin)
            {
                varMin = varD;
                mean = meanD;
            }

            return mean;
        }
    }