The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B5. Beijing 2008 
6. CONCLUSIONS AND ACKNOWLEDGEMENT 
In the paper, we gave the definition of Schrodinger 
transformation of image and extracted the boundary of object 
using I-Type discrete Schrodinger transformation of gradient 
image. Authors would like to acknowledge Professor. Aaron 
Fenster, Robarts Research Institute, London, Canada for 
providing the image of Figure 3(a). This work was partially 
supported by the National Natural Science Foundation of China 
under Grant No. 60572040 and 60672057. 
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