Search code examples
javaeclipseimagemagickruntime.execimagemagick-convert

Calling ImageMagick convert from Java with runtime exec

I want to convert some images from tif to tif to change the photometric interpretation.

I found the ImageMagick Tool and installed it, in command line the following command works and does what i want:

 convert my_image.TIF dest.TIF

Now i want to start it automatically from a Java program. I'm working on Windows, with Eclipse and ImageMagick 6.8.8.-Q16.

I tried with JMagick, but i only got it working with a previous ImageMagick-Version and this had problems converting tifs (every time i got a black image, also in the command line). The newer ImageMagick-Version was not found by the newest JMagick-Version for Windows.

So i tried to use Java Process Builder or the Runtime exec command, for example:

 Process proc = Runtime.getRuntime().exec(new String[]{"convert","my_image.TIF","dest.TIF"});

and 

 ProcessBuilder pb = new ProcessBuilder("convert", "0011D7FE.TIF", "dest.tif");   
 pb.redirectErrorStream(true);   
 try {   
   Process p = pb.start();   
   BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));   
   String line = null;   
   while((line=br.readLine())!=null){   
       System.out.println(line);   
   }   
   System.out.println(p.waitFor());   
  } catch(Exception e) { }

No matter, what command i exactly insert, i always get the error message "Invalid Param - dest.tif" for the second param.

I found this article http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=19679 where the problem is similar and the program tries to use some windows convert function. So I added the ImageMagick-folder to my system variables and also added a new variable which contains this folder to my project build path in eclipse. But I get still the same error. Is there some other place where I have to set up the path? Or any other explanation for the error I get?

Solution

  • Updated Answer 28-MAR-2017

    Since v7 of ImageMagick, the convert command has been replaced by magick to avoid this very problem. So...

    • convert input.tif output.tif becomes magick input.tif output.tif
    • identify image.jpg becomes magick identify image.jpg
    • compare image.jpg ... becomes magick compare image.jpg ...
    • compose image.jpg ... becomes magick compose image.jpg ...
    • mogrify image.jpg ... becomes magick mogrify image.jpg ...

    Original Answer

    You can either rename Windows' built-in convert program as convertntfs or rename ImageMagick's convert as IMconvert. That is probably better than hoping you always remember to set the PATH correctly on all machines.