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FeatherAlphaBlendCommand Class

Combines image data from two images with feathering. The two images can be combined with variable opacity applied by specifying the region of a fade mask image.
public class FeatherAlphaBlendCommand : RasterCommand 
Public Class FeatherAlphaBlendCommand  
   Inherits RasterCommand 
@interface LTFeatherAlphaBlendCommand : LTRasterCommand 
public class FeatherAlphaBlendCommand extends RasterCommand 
public ref class FeatherAlphaBlendCommand : public RasterCommand   
  • To combine two images with a fixed opacity, use the AlphaBlendCommand.
  • The FeatherAlphaBlendCommand achieves feathering between two images by using variable opacity values, obtained from the fade mask referenced by MaskImage. Use the MaskSourcePoint to specify a region of the mask image, these values are the coordinates of the origin of the mask rectangle.
  • To create an image that contains a fade mask, use FadedMaskCommand command.
  • This command supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
  • This command does not support signed data images.
  • This command does not support 32-bit grayscale images.

For more information, refer to Introduction to Image Processing With LEADTOOLS.


Run the FeatherAlphaBlendCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
public void FeatherAlphaBlendCommandExample() 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   RasterImage backgroundImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")); 
   RasterImage sourceImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "LittleGFlyingAlpha.png"), 32, CodecsLoadByteOrder.Bgr, 1, 1); 
   FeatherAlphaBlendCommand command = new FeatherAlphaBlendCommand(); 
   command.DestinationRectangle = new LeadRect(0, 0, sourceImage.Width, sourceImage.Height); 
   command.MaskImage = sourceImage.CreateAlphaImage(); 
   command.SourceImage = sourceImage; 
   command.SourcePoint = new LeadPoint(0, 0); 
   codecs.Save(backgroundImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24); 
static class LEAD_VARS 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Effects 
Public Sub FeatherAlphaBlendCommandExample() 
   ' Load an image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   Dim backgroundImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")) 
   Dim sourceImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "LittleGFlyingAlpha.png"), 32, CodecsLoadByteOrder.Bgr, 1, 1) 
   Dim command As FeatherAlphaBlendCommand = New FeatherAlphaBlendCommand() 
   command.DestinationRectangle = New LeadRect(0, 0, sourceImage.Width, sourceImage.Height) 
   command.MaskImage = sourceImage.CreateAlphaImage() 
   command.SourceImage = sourceImage 
   command.SourcePoint = New LeadPoint(0, 0) 
   codecs.Save(backgroundImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24) 
End Sub 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class 

Target Platforms

Help Version 21.0.2021.7.2
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Leadtools.ImageProcessing.Effects Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.