Thumbnail

[Phanikanth Munukutla]

Hi,
When I run the program ImageUtil1.java using JRE 1.6 ,I am getting a thumb image with good quality.
But If I change the jre version to 1.5 then the quality of the thumb image is not good.

code :

import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

import javax.imageio.ImageIO;

import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGEncodeParam;
import com.sun.image.codec.jpeg.JPEGImageEncoder;



public class ImageUtil1 {

    public static void main (String [] args) {
        try {            
            File myDicomFile = new File("D:\\thumbImages\\i1.jpg");
            FileInputStream fin = new FileInputStream(myDicomFile);
            byte [] imageBytes = new byte[ (int) myDicomFile.length () ];
            System.out.println("ImageUtil1.main() "+imageBytes.length);
            fin.read (imageBytes);            
            saveThumbImage(imageBytes, "QC_i1");            
        } catch (Exception e) { 
            e.printStackTrace ();
        }
    }

    public static void saveThumbImage(byte[] image,String fileName){
    	  try{			
  		 	 Image thumb;
  			 ByteArrayInputStream bis = new ByteArrayInputStream(image);			
  			 thumb = ImageIO.read(bis);  			 
  			 int thumbWidth = Integer.parseInt("128");
  			 int thumbHeight = Integer.parseInt("128");
  			 int width = thumb.getWidth(null);
  	         int height = thumb.getHeight(null);  			 
  	  	  	 BufferedImage   bi = new BufferedImage(thumbWidth,thumbHeight,BufferedImage.TYPE_INT_RGB);
  			 Graphics2D g = bi.createGraphics();
  			 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BICUBIC);
  			 g.drawImage(thumb, 0, 0,thumbWidth,thumbHeight, null);
             ByteArrayOutputStream out1 = new ByteArrayOutputStream();              
  	         JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out1); 
  	         JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
  	         param.setQuality((float)(75/100.0), true);
  	         encoder.encode(bi, param);
  	         byte[] buf  = out1.toByteArray();
  	         String thumbImagePath = "D:\\thumbImages\\";  	        
  			 FileOutputStream os =  new FileOutputStream(new File(thumbImagePath+fileName+".jpg"));
  			 os.write(buf);  			
    	  }	
  		 catch(IOException ioException){  			 
  			 ioException.printStackTrace();  			 
  		 }  
      }
   
    
}

I need it to run it on jre1.5
Please help me


Thanks in advance..

-Phanikanth

[Ulf Dittmer]

It's possible that Sun's internal JPEG handling was improved between Java 5 and Java 6.

If you're concerned about quality, why are you using a setting of only 75%?

[Phanikanth Munukutla]

Even If I make it 100, no use. Its the same result I am getting.

[Rob Spoor]

Moving to Swing / AWT.