Convert an *.jpg - File

Hey,
how can i convert a *.jpg file to another graphicformat for e.g to *.gif or *.bmp.
Is this difficult?
thx for any answer, CADO

You can try http://www.geocities.com/marcoschmidt.geo/java-image-coding.html#pixel
There's a list of Java libraries that read or write pixel (raster, bitmap) image files. You can look for JPEG in the list.
Never tried any of these packages, just suggesting.
Kurta

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So, I almost always shoot in RAW. I then unload all my pix from my cam into IPhoto. When I go to do anything with the pix, I notice that when I drag them out of IPhoto and into Photoshop (Elements 2 or 6), some of them have magically become JPG files. It seems random though. Some stay RAW, some are converted to JPG by the time I put them in PS. Is there some setting in IPhoto that will cause it to go through and start converting everything into JPG one pic at a time? If so, how do I turn that on/off? I have no idea what is going on here.

There's nothing magical about it at all. It's all explained in the Help.
Whenever you import a RAW file iPhoto automatically makes a jpeg preview of the file.
If you then "drag them out of iPhoto" you'll get the Preview. If you export them (using the File -> Export command, Kind: Original) you'll get the RAW file.
If you're editing them, then you do neither. Instead you can set Photoshop (or any image editor) as an external editor in iPhoto. (Preferences -> General -> Edit Photo: Choose from the Drop Down Menu.) This way, when you double click a pic to edit in iPhoto it will open automatically in Photoshop or your Image Editor, and when you save it it's sent back to iPhoto automatically. This is the only way that edits made in another application will be displayed in iPhoto.
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I am trying to convert a large bmp file (160mb) into a jpg file.
However I'm getting outOfMemory errors. This is very strange since I have 1.5gb of Ram and I have set the java heap to 1g.
In any case does anyone know a conversion method that maybe doesn't have to have the whole file in memory at once.
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private void convert2jpg(int imageNum)
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          RenderedOp src = JAI.create("fileload", inputFile);
          String outputFile = "..//images//plate_3x3in_"+ imageNum+".jpg";
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Why not use ImageIO instead? Something like ImageIO.read(File) which returns a BufferedImage and then use that to write to the desired format using ImageIO.write()??

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Hi everybody
here i am converting a jpg file to 2 bit monochrome image.
Though this program is making the bmp monochrome image of passing jpg image.
but the program is hanged in between.
I don't understand the why it is hanging..though it is generating the result.
please help me to solve the hanging problem.
=================================================================================
source output is:
C:\j2sdk1.4.1_02\bin>java jaiexp.JAISampleProgram6 aish5.jpg
1
2
FarmHouse2.bmp image
ERROR: it doesn't finish gracefully....!!
==================================================================================
source code
package jaiexp;
import java.awt.Frame;
import java.awt.image.renderable.ParameterBlock;
import java.io.IOException;
import javax.media.jai.Interpolation;
import javax.media.jai.JAI;
import com.sun.media.jai.codec.BMPEncodeParam;
import javax.media.jai.RenderedOp;
import com.sun.media.jai.codec.FileSeekableStream;
import javax.media.jai.widget.ScrollingImagePanel;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.image.renderable.*;
import javax.media.jai.*;
import javax.media.jai.widget.*;
import com.sun.media.jai.codec.*;
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                    System.out.println("Error:"+e);
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     }//class ends
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     int red = (int)(((rgb >> 16) & 0xff) * 0.3f);
     int green = (int)(((rgb >> 8) & 0xff) * 0.59f);
     int blue = (int)((rgb & 0xff) * 0.11f);
     int bws = ((red+green+blue) > 127) ? 255 : 0;
     return ((alpha & 0xFF) << 24) | ((bws & 0xFF) << 16) | ((bws & 0xFF) << 8) | ((bws & 0xFF) << 0);
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thanks in advance.
regards
- Deepak
email: [email protected]


Also keep in mind that there are two definitions of bitmap. You want the 2-color version where each bit represents one color or the other. However, thanks to Microsoft, their bitmaps are really just uncompressed strings of RGB values, storing each pixel in multiple bits.

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Convert an *.jpg - File

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