Re: Jpeg Quality

Posted by Wayne Rasband on Feb 20, 2007; 1:45am
URL: http://imagej.273.s1.nabble.com/Jpeg-Quality-tp3700302p3700303.html

Here is a macro that allows the user to change the JPEG quality  
setting before saving. Add it to ImageJ/macros/StartupMacros.txt and  
you will be able to save in JPEG format by pressing "j". You will  
need to write a plugin that extends JFileChooser to show the setting  
in the save dialog.

   macro "Save As JPEG... [j]" {
      quality = call("ij.plugin.JpegWriter.getQuality");
      quality = getNumber("JPEG quality (0-100):", quality);
      run("Input/Output...", "jpeg="+quality);
      saveAs("Jpeg");
   }

-wayne

On Feb 19, 2007, at 6:08 PM, Jon Harman wrote:

> Hi,
>
> I'd like to make a jpeg save dialog that shows the quality setting  
> and allows the user to change it before saving (I would recommend  
> this usage as the default for ImageJ).  I can see how to set it,  
> but don't know how to get it.  It would also be nice if the quality  
> number could be incorporated into the file save dialog, to reduce  
> the number of clicks needed.  Here is a fragment of my code:
>
>      double jpegqual = 75;
>
>     GenericDialog gd1 = new GenericDialog("JPEG Quality, 100 is  
> best");
>     gd1.addNumericField("Quality (0-100)",jpegqual,0);
>
>     gd1.showDialog();
>     if(!gd1.wasCanceled()) {
>      jpegqual = gd1.getNextNumber();
>      IJ.run("Input/Output...", "jpeg=" + IJ.d2s(jpegqual));
>      IJ.run("Jpeg...");
>     }
>
> Jon