IsGray8Alpha Property

Summary

Determines whether the file contains 8-bit grayscale image data + alpha.

Syntax

C++/CLI

Java

Python

public bool IsGray8Alpha { get; }

public boolean IsGray8Alpha()

public: 
property bool IsGray8Alpha { 
   bool get(); 
}

IsGray8Alpha # get  (CodecsImageInfo)

Property Value

true if the file contains 8-bit grayscale image data + alpha; false, otherwise. The default value is false.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
 
 
public void CodecsImageInfoIsPalette8AlphaExample() 
{ 
   string fileName = Path.Combine(LEAD_VARS.ImagesDir, "cannon_noisy.png"); 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      CodecsImageInfo info = codecs.GetInformation(fileName, true); 
      Debug.WriteLine(string.Format("IsGray8Alpha: {0}", info.IsGray8Alpha)); 
      if (info.IsPalette8Alpha) 
      { 
         /* These files might get loaded as 8-bit by default.  
         * You can load them as 32-bit if you need the alpha information  
         */ 
         using (RasterImage image = codecs.Load(fileName, 32, CodecsLoadByteOrder.Bgr, 1, 1)) 
         { 
            /* Do something with the bitmap */ 
            Debug.WriteLine("BitsPerPixel = " + image.BitsPerPixel); 
         } 
      } 
   } 
} 
 
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.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
 
 
public void codecsImageInfoIsGray8AlphaExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   String fileName = combine(LEAD_VARS_IMAGES_DIR, "cannon_noisy.png"); 
 
   RasterCodecs codecs = new RasterCodecs(); 
   CodecsImageInfo info = codecs.getInformation(fileName, true); 
   System.out.println("isPalette8Alpha: " + info.isPalette8Alpha()); 
 
   if (info.isGray8Alpha()) { 
      // These files might get loaded as 32-bit by default 
      // * You can load them as 8-bit, alpha information is not needed 
      RasterImage image = codecs.load(fileName, 8, CodecsLoadByteOrder.GRAY, 1, 1); 
 
      // Do something with the bitmap 
      codecs.save(image, fileName, RasterImageFormat.PNG, 0); 
 
      assertTrue("file unsuccessfully saved to " + fileName, (new File(fileName)).exists()); 
      System.out.printf("File saved successfully to %s%n", fileName); 
 
      System.out.println("BitsPerPixel = " + image.getBitsPerPixel()); 
      image.dispose(); 
   } 
 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

CodecsImageInfo Class

CodecsImageInfo Members

Download our FREE evaluation

Help Version 23.0.2024.2.29

Leadtools.Codecs Assembly

Introduction

Getting Started

Namespaces

Leadtools.Codecs Namespace

Assemblies