'Declaration

<DefaultValueAttribute(1)>
<DescriptionAttribute("The gamma value.")>
Public Property Gamma As Double

[DefaultValue(1)]
[Description("The gamma value.")]
public double Gamma { get; set; }

[DefaultValue(1)]
[Description("The gamma value.")]
public: __property double get_Gamma();
public: __property void set_Gamma(
   double value
);

[DefaultValue(1)]
[Description("The gamma value.")]
public:
property double Gamma {
   double get();
   void set(double value);
}

1 - the command will NOT apply the gamma correction to the all channels of image; other value - the command will apply the gamma correction to the all channels of image.
Default value is 1.