Public Function New( _
   ByVal rollingBall As Integer, _
   ByVal shrinkingSize As SubtractBackgroundCommandType, _
   ByVal brightnessFactor As Integer, _
   ByVal flags As SubtractBackgroundCommandFlags _
)

Visual Basic (Usage)	Copy Code
Dim rollingBall As Integer Dim shrinkingSize As SubtractBackgroundCommandType Dim brightnessFactor As Integer Dim flags As SubtractBackgroundCommandFlags   Dim instance As SubtractBackgroundCommand(rollingBall, shrinkingSize, brightnessFactor, flags)

public SubtractBackgroundCommand( 
   int rollingBall,
   SubtractBackgroundCommandType shrinkingSize,
   int brightnessFactor,
   SubtractBackgroundCommandFlags flags
)

public:
SubtractBackgroundCommand( 
   int rollingBall,
   SubtractBackgroundCommandType shrinkingSize,
   int brightnessFactor,
   SubtractBackgroundCommandFlags flags
)

Parameters

rollingBall

The radius (in pixels) of the ball that will roll over the entire image to determine the background. Recommended value is 50. This parameter only accepts positive values.

shrinkingSize

Shrink size ratio used to minimize the image internally in order to increase the speed with little loss of accuracy.

brightnessFactor

Brightness factor for increasing or decreasing the brightness of the image. Valid values range from 0 - 400. If you pass 100 the brightness remains unchanged. Lower values darken the image while higher values lighten the image.

flags

Flags that indicate whether the background is darker than the foreground, and whether to show the objects without the background. You must select one from each group.

Run the SubtractBackgroundCommand on an image.

Visual Basic

Copy Code

Public Sub SubtractBackgroundConstructorExample()    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    codecs.ThrowExceptionsOnInvalidImages = True    Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")    ' Prepare the command    Dim command As SubtractBackgroundCommand = New SubtractBackgroundCommand(50, SubtractBackgroundCommandType.DependOnRollingBallSize, 100, SubtractBackgroundCommandFlags.BackgroundIsDarker)    ' Apply Subtract Background effect on the image.    command.Run(leadImage)    RasterCodecs.Shutdown() End Sub

C#

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public void SubtractBackgroundConstructorExample()  {     // Load an image     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();     codecs.ThrowExceptionsOnInvalidImages = true;       RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg");       // Prepare the command     SubtractBackgroundCommand command = new SubtractBackgroundCommand(50, SubtractBackgroundCommandType.DependOnRollingBallSize, 100, SubtractBackgroundCommandFlags.BackgroundIsDarker);     // Apply Subtract Background effect on the image.     command.Run(image);       RasterCodecs.Shutdown();  }

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference