FeatherAlphaBlendCommand Class

Summary

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.

Syntax

Objective-C

C++/CLI

Java

Python

public class FeatherAlphaBlendCommand : RasterCommand

@interface LTFeatherAlphaBlendCommand : LTRasterCommand

public class FeatherAlphaBlendCommand 
    extends RasterCommand

public ref class FeatherAlphaBlendCommand : public RasterCommand

class FeatherAlphaBlendCommand(RasterCommand):

Remarks

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.

Feather Alpha Blend Function - Before

Feather Alpha Blend Function - After

View additional platform support for this Feather Alpha Blend function.

Example

Run the FeatherAlphaBlendCommand on an image.

Java

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); 
   command.Run(backgroundImage); 
   codecs.Save(backgroundImage, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.assertTrue; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.effects.*; 
 
 
public void featherAlphaBlendCommandExample() { 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   RasterImage backgroundImage = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp")); 
   RasterImage sourceImage = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "LittleGFlyingAlpha.png"), 32, 
         CodecsLoadByteOrder.BGR, 1, 1); 
   FeatherAlphaBlendCommand command = new FeatherAlphaBlendCommand(); 
   command.setDestinationRectangle(new LeadRect(0, 0, sourceImage.getWidth(), sourceImage.getHeight())); 
   command.setMaskImage(sourceImage.createAlphaImage()); 
   command.setSourceImage(sourceImage); 
   command.setSourcePoint(new LeadPoint(0, 0)); 
   int change = command.run(backgroundImage); 
   assertTrue(change != RasterImageChangedFlags.NONE); 
   codecs.save(backgroundImage, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
}