This is for Linux version but i dont know how can i modify that for Windows.
$ tar xzf octave-opencv-031808.tar.gz
$ cd opencv-031808$ ./configure --with-swig --with-octave$ make
$ make install$ octave -q
octave:1> pkg install /usr/local/share/opencv/octave/opencv-1.0.tar.gz
octave:2> pkg listPackage
Name | Version | Installation directory
--------------+---------+-----------------------
opencv *| 1.0.0 | /home/x/octave/opencv-1.0.0
octave:3> I=cvLoadImage("image002.png");
Octave bindings for OpenCV