You can export the image correlation without exporting the entire image by using the iworldout command to create a world file.
The resulting world file shares the same file name as the associated image, but the extension ends in a "w" (for example, the world file for lakshor.tif is lakshor.tfw).
Note: AutoCAD Raster Design toolset exports world files based on World coordinates and imports them based on the current UCS.