• This program must run under a Web browser with a VRML plug-in and EAI. They can be downloaded from here . (EAI is embeded in some VRML plug-ins, such as Cosmo Player.)
  
  
  
• Want to try on your own data? click here to download the program.

1. Choose a data file in raw data format from the first box.
2. Choose an illumination environment from the last box in the first row:
   Full illumination: an environment with both ambient and point light sources;
   Simple illumination: an environment with only ambient source.
3. Click on the Load Data button to load the data from a selected file.
4. Click on the Display button to render the image.

1. Click on any of the X+_rotate, Y+_rotate, Z+_rotate, X-_rotate, Y-_rotate, Z-_rotate buttons to rotate the object about x-, y-, z- axis, where the x-axis extends from left to right, y-axis from bottom to top and z-axis from far away to the viewer. “+” and “-” indicate two inverse rotations.
2. Clicking on the Reset Image redisplays the object in original position.

1. To view an interior part of the object, the user should supply the thickness of that part (first box in the last row), in terms of number of voxels.
2. Choose the step (in terms of number voxels) of the movement of the navigation from the second box in the last row.
3. Click on the Forward Navigate button to navigate the object forward (i.e. away from the viewer). (If nothing happens when this button is clicked on, it means that the viewing volume is empty. Keep clicking until an image appears.)
4. Click on the Backward Navigate button to navigate the object backward (i.e. close to the viewer). (If nothing happens when this button is clicked on, it means that the viewing volume is empty. Keep clicking until an image appears.)
5. Click on the Display button to exit the navigation.

1. Choose a brightness factor in terms of a percentage of the current brightness from the last box.
2. Click on the Display Image button.

The following data are currently available for display:

1. Half_Head: a human head with 128 x 128 x 93 voxels,
2. CT_Head: a human head with 256 x 256 x 113 voxels,
3. MR_Brain: a human brain with 256 x 256 x 109 voxels,
4. Orange: an orange with 256 x 256 x 64 voxels,
5. Pumpkin: a pumpkin with 256 x 256 x 80 voxels,
6. Tomato: a tomato with 256 x 256 x 64 voxels.