Resizing, renaming images...

Question

Okay, maybe Java isnt the solution for this, but I figured I'd check it out.
I'ma photogenic person, I love my digital camera to death but I have a problem... When I take the images off my camera they're like 2200px by 1800px or something to that effect, way to large. So I immediately open them in photoshop, resize them, and save/rename them. It's rather tedious. So I'm looking to write an application, preferably in java, that I will enter in a directory (c:\dir\blah\blah) and it takes all the images in there and resizes them to say 600x400px and bumps the quality down from 10 to 7 (photoshop talk there, heh) then saves them.
Is Java best for this situation, if so, can anyone push me into the right direction?

Answer 1

It can be done with java.
I wrote a hobby application to generate thumb-views (and extract exif data) into a separate directory. It is written in Java including the thumb-views' resizing from the original images. I used code snippets (for resizing) and an exif package found in the internet - see the comment in the code.
If I had your address, I could mail the whole stuff to you.
Beware however the spammers' e-mail-sniffing bots!
As said it was a hobby project. But you do not need to reinvent the wheel.
Image Magic(k) has ready-made tools (convert.exe) for this purpose, you only need to write some launcher script. Or some image viewers could provide a GUI interface to this batch-like activity, maybe Irfanview too.
http://www.imagemagick.org/script/index.php
http://www.irfanview.com/
package hu.bij.thwutil;
//http://blog.cyberjos.idv.tw/space/Esaily+scale+image+in+Java
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
import javax.swing.JFrame;
public class SImage
  public static final String    JPEG = "jpg";
  public static final String    PNG = "png";
  private int                   srcHeight = 0;
  private int                   srcWidth = 0;
  private int                   height = 0;
  private int                   width = 0;
  private double                scale = 0.0;
  private boolean               resized = false;
  private BufferedImage         bimage;
  public SImage( String filename )  throws Exception
    this( filename, 1.0 );
  public SImage( BufferedImage aimage, double scale ) throws Exception
    bimage = aimage;
    srcHeight = bimage.getHeight();
    srcWidth = bimage.getWidth();
    setScale( scale );
  public SImage( String filename, double scale ) throws Exception
    this(ImageIO.read(new File( filename)),scale);
  public void write(String filename, String format ) throws Exception
     write(new File(filename),format);
  public void write( File output, String format ) throws Exception
    BufferedImage       bimage2 = new BufferedImage( width, height, BufferedImage.TYPE_INT_RGB );
    Graphics2D          g2d = ( Graphics2D ) bimage2.getGraphics();
    if ( resized )
      g2d.scale( ( double ) width / srcWidth, ( double ) height / srcHeight );
    else
      g2d.scale( scale, scale );
    g2d.drawImage( bimage, 0, 0, new JFrame() );
    ImageIO.write( bimage2, format, output );
  public void resize( int width, int height )
    if ( width < 1 )
      width = 1;
    if ( height < 1 )
      height = 1;
    this.width = width;
    this.height = height;
    resized = true;
  public boolean isResized()
    return resized;
  public double getScale()
    if ( resized )
      return 0.0;
    return scale;
  public void setScale( double scale )
    if ( scale < 0.01 )
      scale = 0.01;
    else if ( scale > 16.0 )
      scale = 16.0;
    this.scale = scale;
    height = ( int ) ( srcHeight * scale );
    width = ( int ) ( srcWidth * scale );
    resized = false;
  public int getHeight()
    return height;
  public int getWidth()
    return width;
  public int getSrcHeight()
    return srcHeight;
  public int getSrcWidth()
    return srcWidth;
  public static void main( String args[] ) throws Exception
    if ( args.length != 3 )
      System.out.println( "Usage: java ImageScale [src] [dest] [rate]" );
      System.exit( 0 );
    SImage      image = new SImage( args[ 0 ], Double.parseDouble( args[ 2 ] ) );
    image.write( args[ 1 ], SImage.JPEG );
    image.setScale( 0.5 );
    image.write( "1" + args[ 1 ], SImage.PNG );
    image.resize( image.getWidth() + 300, image.getHeight() + 100 );
    image.write( "2" + args[ 1 ], SImage.JPEG );
}