====== how to load huge images with imageJ (on windows64) ======
First, you need to install the "Java Runtime Environment (JRE) 5.0 Update XXX" from [[http://java.sun.com/javase/downloads/index_jdk5.jsp|sun]], make sure you get the "Windows x64"-Version from the page (It doesn't matter if you download the AMD64-version, it will work on intel)

After you've done this, open ImageJ.cfg (in ImageJ-folder) with your favourite text editor and change it to:
  
  C:\PROGRA~2\ImageJ\
  C:\Program Files\Java\jre1.5.0_17\bin\javaw.exe
  -Xmx5000m -cp C:\PROGRA~2\ImageJ\ij.jar ij.ImageJ

Make shure that you add the correct paths (pay attention to "Program Files (x86)" in 8.3-Notation and stuff like that. This makes ImageJ use the 64bit-Version of Java (the 32bit-Version can still be left installed...). -Xmx5000m makes ImageJ use 5GB of RAM, so this should be more than enough.

(taken from [[http://imagejdocu.tudor.lu/doku.php?id=faq:technical:how_do_i_increase_the_memory_in_imagej|ImageJDocu]])