'Declaration
 
Public Function FxUnsharpMask( _
   ByVal ImageID As Integer, _
   ByVal Radius As Integer, _
   ByVal Amount As Double, _
   ByVal Threshold As Integer _
) As GdPictureStatus

public GdPictureStatus FxUnsharpMask( 
   int ImageID,
   int Radius,
   double Amount,
   int Threshold
)

public function FxUnsharpMask( 
    ImageID: Integer;
    Radius: Integer;
    Amount: Double;
    Threshold: Integer
): GdPictureStatus; 

public function FxUnsharpMask( 
   ImageID : int,
   Radius : int,
   Amount : double,
   Threshold : int
) : GdPictureStatus;

public: GdPictureStatus FxUnsharpMask( 
   int ImageID,
   int Radius,
   double Amount,
   int Threshold
) 

public:
GdPictureStatus FxUnsharpMask( 
   int ImageID,
   int Radius,
   double Amount,
   int Threshold
) 

Parameters

ImageID

GdPicture image identifier.

Radius

Radius of Edges to become after the effect is applies. It controls how wide they get after the filter is applied. Radius and Amount interact, reducing one, allows more of the other. Minimum Value of Radius should be 3 or more to allow for enough pixels surrounding the edge to be investigated. If value passed less than 3 is passed it will be ammended automatically to 3. Proper value is 5. Value >= 3.

Amount

Amount of Contrast to be added to areas of edges where filter will be applies. It controls how much darker and how much brighter the edges become. Proper value is 0.5, Value between 0.0-5.0.

Threshold

It controls the amount of edges to be sharpened. Smaller values sharpen more, higher values exclude the subtle edges from being sharpened. Proper value is 40. Value between 0-255.

Return Value

Reference

GdPictureImaging Class
GdPictureImaging Members
SetROI Method
ResetROI Method
FxDespeckle Method
FxDespeckleMore Method