1 files changed, 45 insertions, 36 deletions
diff --git a/dmagick/c/statistic.d b/dmagick/c/statistic.d
index 0bd7841..cf0703c 100644
--- a/dmagick/c/statistic.d
+++ b/dmagick/c/statistic.d
@@ -39,48 +39,57 @@ extern(C)
 		}
 	}
 
+	/**
+	 * Alter channel pixels by evaluating an arithmetic, relational,
+	 * or logical expression.
+	 */
 	enum MagickEvaluateOperator
 	{
-		UndefinedEvaluateOperator,
-		AddEvaluateOperator,
-		AndEvaluateOperator,
-		DivideEvaluateOperator,
-		LeftShiftEvaluateOperator,
-		MaxEvaluateOperator,
-		MinEvaluateOperator,
-		MultiplyEvaluateOperator,
-		OrEvaluateOperator,
-		RightShiftEvaluateOperator,
-		SetEvaluateOperator,
-		SubtractEvaluateOperator,
-		XorEvaluateOperator,
-		PowEvaluateOperator,
-		LogEvaluateOperator,
-		ThresholdEvaluateOperator,
-		ThresholdBlackEvaluateOperator,
-		ThresholdWhiteEvaluateOperator,
-		GaussianNoiseEvaluateOperator,
-		ImpulseNoiseEvaluateOperator,
-		LaplacianNoiseEvaluateOperator,
-		MultiplicativeNoiseEvaluateOperator,
-		PoissonNoiseEvaluateOperator,
-		UniformNoiseEvaluateOperator,
-		CosineEvaluateOperator,
-		SineEvaluateOperator,
-		AddModulusEvaluateOperator,
-		MeanEvaluateOperator,
-		AbsEvaluateOperator,
-		ExponentialEvaluateOperator,
-		MedianEvaluateOperator
+		UndefinedEvaluateOperator,      ///
+		AddEvaluateOperator,            /// Add value to pixels.
+		AndEvaluateOperator,            /// Binary AND of pixels with value.
+		DivideEvaluateOperator,         /// Divide pixels by value.
+		LeftShiftEvaluateOperator,      /// Shift the pixel values left by value bits.
+		MaxEvaluateOperator,            /// Clip pixels at lower bound value.
+		MinEvaluateOperator,            /// Clip pixels at upper bound value.
+		MultiplyEvaluateOperator,       /// Multiply pixels by value.
+		OrEvaluateOperator,             /// Binary OR of pixels with value.
+		RightShiftEvaluateOperator,     /// Shift the pixel values right by value bits.
+		SetEvaluateOperator,            /// Set pixel equal to value.
+		SubtractEvaluateOperator,       /// Subtract value from pixels.
+		XorEvaluateOperator,            /// Binary XOR of pixels with value.
+		PowEvaluateOperator,            /// Raise normalized pixels to the power value.
+		LogEvaluateOperator,            /// Apply scaled logarithm to normalized pixels.
+		ThresholdEvaluateOperator,      /// Threshold pixels larger than value.
+		ThresholdBlackEvaluateOperator, /// Threshold pixels to zero values equal to or below value.
+		ThresholdWhiteEvaluateOperator, /// Threshold pixels to maximum values above value.
+		GaussianNoiseEvaluateOperator,       /// 
+		ImpulseNoiseEvaluateOperator,        /// ditto
+		LaplacianNoiseEvaluateOperator,      /// ditto
+		MultiplicativeNoiseEvaluateOperator, /// ditto
+		PoissonNoiseEvaluateOperator,        /// ditto
+		UniformNoiseEvaluateOperator,        /// ditto
+		CosineEvaluateOperator,      /// Apply cosine to pixels with frequency value with 50% bias added.
+		SineEvaluateOperator,        /// Apply sine to pixels with frequency value with 50% bias added.
+		AddModulusEvaluateOperator,  /// Add value to pixels modulo QuantumRange.
+		MeanEvaluateOperator,        /// Add the value and divide by 2.
+		AbsEvaluateOperator,         /// Add value to pixels and return absolute value.
+		ExponentialEvaluateOperator, /// base-e exponential function.
+		MedianEvaluateOperator       /// Choose the median value from an image sequence.
 	}
 
+	/**
+	 * Apply a function to channel values.
+	 * 
+	 * See_Also: $(XREF Image, functionImage).
+	 */
 	enum MagickFunction
 	{
-		UndefinedFunction,
-		PolynomialFunction,
-		SinusoidFunction,
-		ArcsinFunction,
-		ArctanFunction
+		UndefinedFunction,  ///
+		PolynomialFunction, /// ditto
+		SinusoidFunction,   /// ditto
+		ArcsinFunction,     /// ditto
+		ArctanFunction      /// ditto
 	}
 
 	ChannelStatistics* GetImageChannelStatistics(const(Image)*, ExceptionInfo*);