ISPRS 2008 : Proceedings of the XXI congress : Silk road for information from imagery : the International Society for Photogrammetry and Remote Sensing, 3-11 July, Beijing, China. Comm. VIII, WG VIII/3. Beijing : ISPRS, 2008. pp. 619-625, 619-625 STARTPAGE=619;ENDPAGE=625;TITLE=ISPRS 2008 : Proceedings of the XXI congress : Silk road for information from imagery : the International Society for Photogrammetry and Remote Sensing, 3-11 July, Beijing, China. Comm. VIII, WG VIII/3. Beijing : ISPRS, 2008. pp. 619-625