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Re: Work around requested

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On 12/20/2011 5:33 PM, bH wrote:
> On Dec 20, 8:13 pm, "John B. Matthews"<nos...@nospam.invalid>  wrote:
>> In article
>> <4decc207-ebaa-4d1c-9952-b73f18817...@k10g2000yqk.googlegroups.com>,
>>
>>
>>
>>
>>
>>   bH<bherbs...@hotmail.com>  wrote:
>>> I compared the output using one large image
>>> 1600 x 1200 pixels cropped to 200 x 150 in both
>>> programs, first program uses:
>>> com.sun.image.codec.jpeg.JPEGCodec
>>> and the second program with the revision as suggested
>>> above by John Matthews:
>>> uses the classes javax.imageio.ImageIO and
>>> java.awt.image.AffineTransformOp.
>>
>>> The comparison result is that the suggested
>>> revision by John Matthews comes in second place.
>>> It does do crop it, but is less perfect of a
>>> crop than the first method listed.
>>> For instance in the second program,
>>> the image is not as sharp and clear.
>>
>> Kudos for comparing. What interpolationType did you use?
>>
>> <http://docs.oracle.com/javase/7/docs/api/java/awt/image/AffineTransfo...>- Hide quoted text -
>>
>> - Show quoted text -
>
> John,
> After you read my code,as usual
> happens here, I'll have to take all criticism
> that I deserve. I hope that I have limited my
> line lengths to enable to fit it in.
>
> Hi Knute,
> I have combined your work dated 12-31-2005
> found in this link:
> <  //http://www.velocityreviews.com/forums/t148931-how-to-resize-a-jpg-
> image-file.html>
>
> import java.awt.*;
> import java.awt.geom.*;
> import java.awt.image.*;
> import javax.imageio.*;
> import java.awt.event.*;
> import javax.swing.*;
> import java.awt.EventQueue;
> import java.awt.image.BufferedImage;
> import java.io.File;
> import java.io.IOException;
>
>
> public class  DataScaleImageThmbNail extends JFrame
>    implements ActionListener  {
>
>    private JButton dataTransferBtn  =
>      new JButton("Make Thumbnail");
>    private JButton closeBtn = new JButton("Close");
>    private JPanel infoPanel = new JPanel();
>
>    JLabel NameOrNumberLabel =
>      new JLabel (" Enter Image Name or Number" );
>    JLabel ThmbNailWidth =
>      new JLabel ("              Enter Width for Thumbnail" );
>    JLabel ThmbNailHeight =
>      new JLabel ("            Enter Height for Thumbnail" );
>
>    JTextField namOrNum  = new JTextField("EnterDataHere",10);
>    JTextField tfThumbNailWidth  = new JTextField("200",10);
>    JTextField tfThumbNailHeight  = new JTextField("150",10);
>    String alfaNumeric  =" ";
>    String stringWidth = " ";
>    String stringHeight = " ";
>
>
>    DataScaleImageThmbNail() {
>      setTitle("ImgDataTest");
>
>      add(infoPanel,BorderLayout.CENTER);
>
>      JPanel infoPanel= new JPanel();
>
>      // TextArea for directions
>      infoPanel.add(new JTextArea(content));
>
>      // TextField for name of image
>      infoPanel.add(NameOrNumberLabel );
>      namOrNum  = new JTextField("12A", 12);
>      infoPanel.add( namOrNum  );
>      dataTransferBtn.addActionListener(this);
>
>      // TextField for width of thumbnail
>      infoPanel.add(ThmbNailWidth);
>      infoPanel.add (tfThumbNailWidth);
>      dataTransferBtn.addActionListener(this);
>
>      // TextField for height of thumbnail
>      infoPanel.add(ThmbNailHeight);
>      infoPanel.add (tfThumbNailHeight);
>      dataTransferBtn.addActionListener(this);
>
>      dataTransferBtn.addActionListener(this);
>      infoPanel.add(dataTransferBtn );
>
>      infoPanel.add(closeBtn);
>      closeBtn.addActionListener(this);
>
>      Container contentPane= getContentPane();
>      contentPane.add(infoPanel);
>
>      setSize(350,350);
>      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
>
>      setVisible(true);
>    }
>    static String content =
>      "Please place 2 folders on the desktop. \n"
>      + " Name one 'LargeImageFolder' to put your large .jpg into it.
> \n"
>      + " then the second folder name it  'ThmnailFolder'.  \n"
>      + " Caution, each .jpg should have a unique 'name'  \n"
>      + " as examples '031', 'Bob2.  \n"
>      + " Make only one thumbnail at a time.  \n"
>      + " For each one, click the 'Make Thumbnail' button. \n"
>      + " The .jpg thumbnails have the same name\n"
>      + " as the original .jpg \n"
>      + " You will find them in 'ThmnailFolder' \n"
>      + " A 'Close' button is provided to close the program.";
>
>
>    public void actionPerformed(ActionEvent e) {
>
>      if(e.getSource() == dataTransferBtn){
>        alfaNumeric = namOrNum.getText();
>        //System.out.println(alfaNumeric);
>
>        stringWidth  = tfThumbNailWidth.getText();
>       // System.out.println(stringWidth);
>
>
>        stringHeight = tfThumbNailHeight.getText();
>       // System.out.println(stringHeight );
>        ScaleImage2x (alfaNumeric, stringWidth, stringHeight ) ;
>      }
>      if(e.getSource() == closeBtn){
>        System.exit(0);
>      }
>
>    }
>
>    public static void main(String[] args) {
>      EventQueue.invokeLater(new Runnable() {
>        public void run() {
>          DataScaleImageThmbNail  DataScaleImageThmbNail
>            = new  DataScaleImageThmbNail ();
>        }
>      });
>    }
>
>    public void ScaleImage2x (String alnumeric,
>        String stringWidth,String stringHeight) {
>
>      String srcFile=  "C:/Users/Bob/Desktop/LargeImageFolder/"
>        + alnumeric+ ".jpg";
>      String destFile=  "C:/Users/Bob/Desktop/ThmnailFolder/"
>        + alnumeric+ ".jpg";
>
>      int destWidth = Integer.parseInt(stringWidth);
>      int destHeight = Integer.parseInt(stringHeight);
>
>
>      try {
>        BufferedImage src = ImageIO.read(new File(srcFile));
>
>        BufferedImage dest = new BufferedImage(destWidth,destHeight,
>             BufferedImage.TYPE_INT_RGB);
>        Graphics2D g = dest.createGraphics();
>        AffineTransform at = AffineTransform.getScaleInstance(
>             (double)destWidth/src.getWidth(),
>              (double)destHeight/src.getHeight());
>        g.drawRenderedImage(src,at);
>        ImageIO.write(dest,"JPG",new File(destFile));
>        //at.close();
>      }
>      catch (Exception e)
>      {
>        e.printStackTrace( System.out ) ;
>      }
>    }
> }
>
> bH

I've learned some things since then :-).  See the docs for 
AffineTransformOP.  I've found on many occasions that when the images 
look bad after some Op that they need to be converted to compatible 
images (matching color space).


     public static BufferedImage scaleImage(BufferedImage src, double sx,
      double sy, int interpolationType) {
         AffineTransformOp op = new AffineTransformOp(
          AffineTransform.getScaleInstance(sx,sy),interpolationType);
         return op.filter(src,null);
     }

     public static BufferedImage scaleImage(BufferedImage src, double sx,
      double sy, RenderingHints hints) {
         AffineTransformOp op = new AffineTransformOp(
          AffineTransform.getScaleInstance(sx,sy),hints);
         return op.filter(src,null);
     }

     public static BufferedImage convertToCompatible(BufferedImage image) {
         GraphicsEnvironment ge =
          GraphicsEnvironment.getLocalGraphicsEnvironment();
         GraphicsDevice gd = ge.getDefaultScreenDevice();
         GraphicsConfiguration gc = gd.getDefaultConfiguration();

         BufferedImage compatible = 
gc.createCompatibleImage(image.getWidth(),
          image.getHeight());

         if (compatible.getType() == image.getType())
             return image;

         ColorConvertOp op = new ColorConvertOp(
          image.getColorModel().getColorSpace(),
          compatible.getColorModel().getColorSpace(),null);

         return op.filter(image,compatible);
     }


-- 

Knute Johnson

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Thread

Work around requested bH <bherbst65@hotmail.com> - 2011-12-17 19:03 -0800
  Re: Work around requested Lew <lewbloch@gmail.com> - 2011-12-17 19:19 -0800
    Re: Work around requested "John B. Matthews" <nospam@nospam.invalid> - 2011-12-18 01:36 -0500
      Re: Work around requested Lew <lewbloch@gmail.com> - 2011-12-17 23:39 -0800
      Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-18 21:01 -0800
        Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-20 15:46 -0800
          Re: Work around requested Knute Johnson <nospam@knutejohnson.com> - 2011-12-20 16:53 -0800
            Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-20 17:02 -0800
              Re: Work around requested Knute Johnson <nospam@knutejohnson.com> - 2011-12-20 20:43 -0800
          Re: Work around requested "John B. Matthews" <nospam@nospam.invalid> - 2011-12-20 20:13 -0500
            Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-20 17:33 -0800
              Re: Work around requested Knute Johnson <nospam@knutejohnson.com> - 2011-12-20 20:47 -0800
                Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-21 13:58 -0800
                Re: Work around requested Knute Johnson <nospam@knutejohnson.com> - 2011-12-21 16:09 -0800
                Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-21 18:58 -0800
                Re: Work around requested Knute Johnson <nospam@knutejohnson.com> - 2011-12-21 19:09 -0800
                Re: Work around requested bH <bherbst65@hotmail.com> - 2011-12-21 18:50 -0800
  Re: Work around requested Roedy Green <see_website@mindprod.com.invalid> - 2011-12-18 12:51 -0800
    Re: Work around requested Joerg Meier <joergmmeier@arcor.de> - 2011-12-24 02:18 +0100

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