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CombineFastCommand Class
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Leadtools.ImageProcessing Namespace : CombineFastCommand Class



Combines image data from two images (source and destination), letting you specify the areas to be combined and the operations to be performed when combining the data.

Object Model


Syntax

Visual Basic (Declaration) 
Public Class CombineFastCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As CombineFastCommand
C# 
public class CombineFastCommand : RasterCommand, IRasterCommand 
C++/CLI 
public ref class CombineFastCommand : public RasterCommand, IRasterCommand 

Example

The following example loads two images and combines them using an "AND" operation.

Remarks

As an example, suppose you use SpatialFilterCommand class to apply an edge detection filter. You can then use this class to combine the resulting image with the original one to produce an image with hard edges.

The CombineFastCommand class works by combining the image in the DestinationImage property with the image passed to the RasterCommand.Run method. The DestinationImage will then hold the result of the combine operation.

The CombineFastCommand flags are divided into four groupings: source (SRC) flags, destination (DST) flags, operation (OP) flags, and resulting image (RES) flags. The flags apply only to the defined rectangles (not necessarily the whole image). The flags are applied in the following order:

  1. Operations on the source and destination rectangles are applied. These are implemented at the same time.
  2. Combining operations are performed.
  3. Operations on the resulting rectangle are applied.

You can use a bitwise OR (|) to specify one flag from each group.
GroupFlags
Flags that define treatment of the source rectangleNone, SourceNot, Source0, Source1
Flags that define treatment of the destination rectangleDestinationNot, Destination0, Destination1
Flags that define the operation to use when combining the dataOperationOr, OperationXor, OperationAdd, OperationSubtractSource, OperationSubtractDestination, OperationMultiply, OperationDivideSource, OperationDivideDestination, OperationAverage, OperationMinimum, OperationMaximum
Flags that define treatment of the resulting image rectangleResultNot, Result0, Result1, SourceCopy

Certain flags when combined have no meaning:

  • Setting the flag (RES flags) to either CB_RES_0 or CB_RES_1 will render the rest of the flags useless.
  • Setting the SRC and DST flags to CB_SRC_0 and CB_DST_0 respectively, then the OP flags (the operation flags) will be useless.
  • Setting the SRC and DST flags to CB_SRC_1 and CB_DST_1 respectively, then the OP flags (the operation flags) will be useless.
  • Setting the flag (OP Flags) to CB_OP_ADD or CB_OP_OR or CB_OP_MAX, while setting the (SRC flags) to CB_SRC_1 will make the (DST flags) useless.
  • Setting the flag (OP Flags) to CB_OP_ADD or CB_OP_OR or CB_OP_MAX, while setting the (DST flags) to CB_SRC_1 will make the (SRC flags) useless.
  • Setting the flag (OP Flags) to CB_OP_AND or CB_OP_SUBDST or CB_OP_MIN, while setting the (SRC flags) to CB_SRC_0 will make the (DST flags) useless.
  • Setting the flag (OP Flags) to CB_OP_AND or CB_OP_SUBSRC or CB_OP_MIN, while setting the (DST flags) to CB_SRC_0 will make the (SRC flags) useless.

For more options, like specifying the color plane, use CombineCommand.

For more information, refer to Processing an Image.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.CombineFastCommand

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also