Monday, 9 September 2013

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How to Create ThumbNail Images In Java

You can do image resizing in java by using imgscalr . You can create thumbnails easily , by providing desired width and height . Here is the Pom Dependency for imgscalr :

Or, you can download it with this link . Here is the sample java program to convert an image into 50*50 thumbnail .
package com.datamigration.main;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;

import org.imgscalr.Scalr;
import org.imgscalr.Scalr.Method;

 * @author Abhishek Somani
public class ThumbnailExample {
 public static void main(String[] args) throws IOException {
  long startTime = System.currentTimeMillis();
  File f = new File("C:\\Users\\Public\\Pictures\\Sample Pictures\\Chrysanthemum.jpg");
  BufferedImage img =; // load image

  //Quality indicate that the scaling implementation should do everything
   // create as nice of a result as possible , other options like speed
   // will return result as fast as possible
//Automatic mode will calculate the resultant dimensions according
//to image orientation .so resultant image may be size of 50*36.if you want
//fixed size like 50*50 then use FIT_EXACT
//other modes like FIT_TO_WIDTH..etc also available.

  BufferedImage thumbImg = Scalr.resize(img, Method.QUALITY,Mode.AUTOMATIC, 
                   50, Scalr.OP_ANTIALIAS);
   //convert bufferedImage to outpurstream 
  ByteArrayOutputStream os = new ByteArrayOutputStream();
  //or wrtite to a file
  File f2 = new File("C:\\Users\\Public\\Pictures\\Sample Pictures\\Chrysanthemum_thumb.jpg");
  ImageIO.write(thumbImg, "jpg", f2);
  System.out.println("time is : " +(System.currentTimeMillis()-startTime));


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