AlphaChannelLossless Property

Summary

Gets or sets a value indicating whether to save the alpha channel as lossless.

Syntax

Objective-C

C++/CLI

Java

Python

public bool AlphaChannelLossless { get; set; }

@property (nonatomic, assign) BOOL alphaChannelLossless;

public boolean getAlphaChannelLossless() 
public void setAlphaChannelLossless(boolean value)

public: 
property bool AlphaChannelLossless { 
   bool get(); 
   void set (    bool ); 
}

AlphaChannelLossless # get and set (CodecsJpeg2000SaveOptions)

Property Value

Value	Description
true	To save the alpha channel as lossless.
false	To not save the alpha channel as lossless. The default value is false.

Remarks

The default value is true. The resulting image is 32-bit. The value of this property controls the compression type of alpha channel for J2K/JP2 lossy compression. This option should be used on a 32-bit bitmap otherwise it has no effect.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
 
using Leadtools.ImageProcessing.Core; 
using Leadtools.Pdf; 
 
public void CodecsJpeg2000OptionsExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.j2k"); 
 
   CodecsJpeg2000PrecinctSize[] precintSizes = (CodecsJpeg2000PrecinctSize[])Enum.GetValues(typeof(CodecsJpeg2000PrecinctSize)); 
   foreach (var precinctSize in precintSizes) 
   { 
      Console.WriteLine($"PrecinctSize types: {precinctSize}"); 
   } 
 
   //Setting the Jpeg2000 load options. CodecsJpeg2000Options & CodecsJpeg2000LoadOptions reference 
   codecs.Options.Jpeg2000.Load.J2kResolution = new LeadSize(800, 800); 
   codecs.Options.Jpeg2000.Load.Jp2Resolution = new LeadSize(800, 800); 
   codecs.Options.Jpeg2000.Load.CmwResolution = new LeadSize(0, 0); 
 
   //loading a Jpeg2000 image. 
   RasterImage srcImage = codecs.Load(srcFileName); 
 
   //Setting the Jpeg2000 save options. CodecsJpeg2000SaveOptions reference 
   codecs.Options.Jpeg2000.Save.AlphaChannelActiveBits = 16; 
   codecs.Options.Jpeg2000.Save.AlphaChannelLossless = false; 
   codecs.Options.Jpeg2000.Save.CompressionControl = CodecsJpeg2000CompressionControl.Ratio; 
   codecs.Options.Jpeg2000.Save.CompressionRatio = 15.0f; 
   codecs.Options.Jpeg2000.Save.DecompositionLevels = 5; 
   codecs.Options.Jpeg2000.Save.DerivedQuantization = true; 
   codecs.Options.Jpeg2000.Save.ImageAreaHorizontalOffset = 0; 
   codecs.Options.Jpeg2000.Save.ImageAreaVerticalOffset = 0; 
   codecs.Options.Jpeg2000.Save.ProgressingOrder = CodecsJpeg2000ProgressionsOrder.PositionComponentResolutionLayer; 
   codecs.Options.Jpeg2000.Save.PrecinctSize = CodecsJpeg2000PrecinctSize.HierarchicalOne64; 
   codecs.Options.Jpeg2000.Save.ReferenceTileHeight = 240; 
   codecs.Options.Jpeg2000.Save.ReferenceTileWidth = 480; 
   codecs.Options.Jpeg2000.Save.RegionOfInterest = CodecsJpeg2000RegionOfInterest.UseLeadRegion; 
   codecs.Options.Jpeg2000.Save.RegionOfInterestRectangle = new LeadRect(0, 0, 0, 0); 
   codecs.Options.Jpeg2000.Save.TargetFileSize = 10240; 
   codecs.Options.Jpeg2000.Save.TileHorizontalOffset = 0; 
   codecs.Options.Jpeg2000.Save.TileVerticalOffset = 0; 
   codecs.Options.Jpeg2000.Save.UseColorTransform = true; 
   codecs.Options.Jpeg2000.Save.UseEphMarker = false; 
   codecs.Options.Jpeg2000.Save.UseRegionOfInterest = false; 
   codecs.Options.Jpeg2000.Save.UseSopMarker = false; 
 
   //Save the first sample. 
   codecs.Save(srcImage, Path.Combine(LEAD_VARS.ImagesDir, "Image1_test.j2k"), RasterImageFormat.J2k, srcImage.BitsPerPixel); 
   codecs.Options.Jpeg2000.Save.Reset(); 
 
   //changing some of the Jpeg2000 save options 
   codecs.Options.Jpeg2000.Save.CompressionRatio = 23.0f; 
   codecs.Options.Jpeg2000.Save.DecompositionLevels = 6; 
   codecs.Options.Jpeg2000.Save.ReferenceTileHeight = 320; 
   codecs.Options.Jpeg2000.Save.ReferenceTileWidth = 320; 
   codecs.Options.Jpeg2000.Save.UseEphMarker = true; 
   codecs.Options.Jpeg2000.Save.ProgressingOrder = CodecsJpeg2000ProgressionsOrder.ResolutionPositionComponentLayer; 
   codecs.Options.Jpeg2000.Save.UseSopMarker = true; 
   codecs.Options.Jpeg2000.Save.TargetFileSize = 102400; 
 
   var maximumComponentsNumber = CodecsJpeg2000SaveOptions.MaximumComponentsNumber; 
   var maximumDecompressionLevels = CodecsJpeg2000SaveOptions.MaximumDecompressionLevels; 
   Console.WriteLine("MaximumComponents: {0}, MaximumDecompressionLevels: {1}", maximumComponentsNumber, maximumDecompressionLevels); 
 
   //Save the first sample. 
   codecs.Save(srcImage, Path.Combine(LEAD_VARS.ImagesDir, "Image1_test.jp2"), RasterImageFormat.J2k, srcImage.BitsPerPixel); 
 
   // Clean up 
   srcImage.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
import java.net.URI; 
import java.net.URISyntaxException; 
import java.nio.file.Paths; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.MinMaxBitsCommand; 
 
 
public void codecsJpeg2000OptionsExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.j2k"); 
   CodecsJpeg2000PrecinctSize[] precinctSizes = CodecsJpeg2000PrecinctSize.values(); 
   System.out.println(precinctSizes.toString()); 
 
   // Setting the Jpeg2000 load options. CodecsJpeg2000Options & 
   // CodecsJpeg2000LoadOptions reference 
   codecs.getOptions().getJpeg2000().getLoad().setJ2kResolution(new LeadSize(800, 800)); 
   codecs.getOptions().getJpeg2000().getLoad().setJp2Resolution(new LeadSize(800, 800)); 
   codecs.getOptions().getJpeg2000().getLoad().setCmwResolution(new LeadSize(0, 0)); 
 
   // loading a Jpeg2000 image. 
   RasterImage srcImage = codecs.load(srcFileName); 
 
   // Setting the Jpeg2000 save options. CodecsJpeg2000SaveOptions reference 
   codecs.getOptions().getJpeg2000().getSave().setAlphaChannelActiveBits(16); 
   codecs.getOptions().getJpeg2000().getSave().setAlphaChannelLossless(false); 
   codecs.getOptions().getJpeg2000().getSave().setCompressionControl(CodecsJpeg2000CompressionControl.RATIO); 
   codecs.getOptions().getJpeg2000().getSave().setCompressionRatio(15.0f); 
   codecs.getOptions().getJpeg2000().getSave().setDecompositionLevels(5); 
   codecs.getOptions().getJpeg2000().getSave().setDerivedQuantization(true); 
   codecs.getOptions().getJpeg2000().getSave().setImageAreaHorizontalOffset(0); 
   codecs.getOptions().getJpeg2000().getSave().setImageAreaVerticalOffset(0); 
   codecs.getOptions().getJpeg2000().getSave() 
         .setProgressingOrder(CodecsJpeg2000ProgressionsOrder.POSITION_COMPONENT_RESOLUTION_LAYER); 
   codecs.getOptions().getJpeg2000().getSave().setPrecinctSize(CodecsJpeg2000PrecinctSize.HIERARCHICAL_ONE_64); 
   codecs.getOptions().getJpeg2000().getSave().setReferenceTileHeight(240); 
   codecs.getOptions().getJpeg2000().getSave().setReferenceTileWidth(480); 
   codecs.getOptions().getJpeg2000().getSave().setRegionOfInterest(CodecsJpeg2000RegionOfInterest.USE_LEAD_REGION); 
   codecs.getOptions().getJpeg2000().getSave().setRegionOfInterestRectangle(new LeadRect(0, 0, 0, 0)); 
   codecs.getOptions().getJpeg2000().getSave().setTargetFileSize(10240); 
   codecs.getOptions().getJpeg2000().getSave().setTileHorizontalOffset(0); 
   codecs.getOptions().getJpeg2000().getSave().setTileVerticalOffset(0); 
   codecs.getOptions().getJpeg2000().getSave().setUseColorTransform(true); 
   codecs.getOptions().getJpeg2000().getSave().setUseEphMarker(false); 
   codecs.getOptions().getJpeg2000().getSave().setUseRegionOfInterest(false); 
   codecs.getOptions().getJpeg2000().getSave().setUseSopMarker(false); 
 
   // Save the first sample. 
   codecs.save(srcImage, combine(LEAD_VARS_IMAGES_DIR, "Image1_test.j2k"), RasterImageFormat.J2K, 
         srcImage.getBitsPerPixel()); 
   codecs.getOptions().getJpeg2000().getSave().reset(); 
 
   // changing some of the Jpeg2000 save options 
   codecs.getOptions().getJpeg2000().getSave().setCompressionRatio(23.0f); 
   codecs.getOptions().getJpeg2000().getSave().setDecompositionLevels(6); 
   codecs.getOptions().getJpeg2000().getSave().setReferenceTileHeight(320); 
   codecs.getOptions().getJpeg2000().getSave().setReferenceTileWidth(320); 
   codecs.getOptions().getJpeg2000().getSave().setUseEphMarker(true); 
   codecs.getOptions().getJpeg2000().getSave() 
         .setProgressingOrder(CodecsJpeg2000ProgressionsOrder.RESOLUTION_POSITION_COMPONENT_LAYER); 
   codecs.getOptions().getJpeg2000().getSave().setUseSopMarker(true); 
   codecs.getOptions().getJpeg2000().getSave().setTargetFileSize(102400); 
   CodecsJpeg2000SaveOptions csSaveOptions = new CodecsJpeg2000SaveOptions(null); 
   var maximumComponentsNumber = csSaveOptions.getMaximumComponentsNumber(); 
   var maximumDecompressionLevels = csSaveOptions.getMaximumDecompressionLevels(); 
   System.out.println("MaximumComponents: " + maximumComponentsNumber + ", MaximumDecompressionLevels: " 
         + maximumDecompressionLevels); 
 
   // Save the first sample. 
   String outputFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1_test.jp2"); 
   codecs.save(srcImage, outputFileName, RasterImageFormat.J2K, srcImage.getBitsPerPixel()); 
 
   assertTrue("File unsuccessfully saved to " + outputFileName, (new File(outputFileName)).exists()); 
   System.out.printf("File successfully saved to %s%n", outputFileName); 
 
   // Clean up 
   srcImage.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

CodecsJpeg2000SaveOptions Class

CodecsJpeg2000SaveOptions Members

Programming With JPEG 2000 Features

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Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

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Leadtools.Codecs Namespace

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