RasterImage Constructor(SerializationInfo,StreamingContext)

Summary

This constructor is required by ISerializable.

Syntax

C++/CLI

Python

protected RasterImage( 
   SerializationInfo info, 
   StreamingContext context 
)

protected: 
RasterImage(  
   SerializationInfo^ info, 
   StreamingContext context 
)

__init__(self,info,context) # Overloaded constructor

Parameters

info
The data needed to serialize or deserialize an object.

context
The source and destination of a given serialized stream.

Remarks

The RasterImage class supports standard .NET serialization. Serialization of a RasterImage is the process of converting the state of a RasterImage object into a form that can be persisted or transported. The complement of serialization is deserialization, which converts a stream into an RasterImage object. Together, these processes allow the image data to be easily stored and transferred.

When you serialize an RasterImage object, all the data inside the object are saved. This includes the image data of all pages as well as the current page number, region information, low bit/high bit, palette data, metadata (tags, markers and comments), etc. In other words, the RasterImage can be constructed back to its original state from the stream.

For more information and examples regarding serialization of an RasterImage object, refer to RasterImage Serialization.

For more information, refer to Grayscale Images.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
 
 
public void MyRasterImageSerializationTest() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   RasterImage img = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp")); 
 
   // create a new MyRasterImage instance out of this image 
   MyRasterImage myImage = new MyRasterImage(img); 
 
   // Set our custom data 
   myImage.MyIntegerData = 10; 
   myImage.MyStringData = "My string"; 
   string msg = string.Format("Before serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData); 
   Console.WriteLine(msg); 
 
   // img is invalid now and should be disposed 
   img.Dispose(); 
 
   // Serialize myImage 
   BinaryFormatter formatter = new BinaryFormatter(); 
   MemoryStream ms = new MemoryStream(); 
   formatter.Serialize(ms, myImage); 
 
   // dispose myImage 
   myImage.Dispose(); 
   myImage = null; 
 
   // Deserialize back from the stream 
   ms.Position = 0; 
   myImage = formatter.Deserialize(ms) as MyRasterImage; 
 
   msg = string.Format("After serialization.  MyIntegerData = {0}, MyStringData = {1}", myImage.MyIntegerData, myImage.MyStringData); 
   Console.WriteLine(msg); 
 
   // re-save the image 
   codecs.Save(myImage, Path.Combine(LEAD_VARS.ImagesDir, "Image1_MySerialized.bmp"), RasterImageFormat.Bmp, 24); 
 
   // Clean up 
   ms.Close(); 
   ms.Dispose(); 
   myImage.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.FileOutputStream; 
import java.io.IOException; 
import java.io.ObjectInputStream; 
import java.io.ObjectOutputStream; 
 
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 MyRasterImageSerializationTest() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   RasterImage img = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "sample5.cmp")); 
 
   // create a new MyRasterImage instance out of this image 
   SerializeRasterImage myImage = new SerializeRasterImage(img); 
 
   // Set our custom data 
   myImage.setMyIntegerData(10); 
   myImage.setMyStringData("My string"); 
   String msg = String.format("Before serialization.  MyIntegerData = %s, MyStringData = %s%n", 
         myImage.getMyIntegerData(), myImage.getMyStringData()); 
   System.out.println(msg); 
 
   // img is invalid now and should be disposed 
   img.dispose();; 
 
   // Serialization 
   try { 
      // Saving of object in a file 
      File serFile = new File(combine(LEAD_VARS_IMAGES_DIR, "Serialized.txt")); 
      FileOutputStream fos = new FileOutputStream(serFile); 
      ObjectOutputStream out = new ObjectOutputStream(fos); 
 
      // Method for serialization of object 
      out.writeObject(myImage); 
 
      out.close(); 
      fos.close(); 
 
      System.out.println("Object has been serialized"); 
 
      // dispose myImage 
      myImage = null; 
 
      // Deserialize back from the stream 
      // Reading the object from a file 
      File deserFile = new File(combine(LEAD_VARS_IMAGES_DIR, "Serialized.txt")); 
      FileInputStream fis = new FileInputStream(deserFile); 
      ObjectInputStream in = new ObjectInputStream(fis); 
 
      // Method for deserialization of object 
      myImage = (SerializeRasterImage) in.readObject(); 
 
      in.close(); 
      fis.close(); 
 
      System.out.println("Object has been deserialized "); 
      System.out.println("a = " + myImage.getMyIntegerData()); 
      System.out.println("b = " + myImage.getMyStringData()); 
 
   } catch (IOException | ClassNotFoundException ex) { 
      System.out.println(ex); 
   } 
 
   msg = String.format("After serialization.  MyIntegerData = %s, MyStringData = %s%n", myImage.getMyIntegerData(), 
         myImage.getMyStringData()); 
   System.out.println(msg); 
 
   // re-save the image 
   codecs.save(myImage, combine(LEAD_VARS_IMAGES_DIR, "Image1_MySerialized.bmp"), RasterImageFormat.BMP, 24); 
 
   assertTrue("Image unsuccessfully saved to " + combine(LEAD_VARS_IMAGES_DIR, "Image1_MySerialized.bmp"), 
         (new File(combine(LEAD_VARS_IMAGES_DIR, "Image1_MySerialized.bmp"))).exists()); 
   System.out.println("Image is saved to " + combine(LEAD_VARS_IMAGES_DIR, "Image1_MySerialized.bmp")); 
 
   // Clean up 
   myImage.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

Overload List

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Help Version 23.0.2024.2.29

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