1. Korea Post, 2001 Annual Report on Postal Service, consulted
http://www.koreapost.go.kr
2. Lecture Notes in Computer Science;M.-s. Park,2004
3. Chang, S.-K.: Principles pictorial Information Systems Design, pp. 43–81. Prentice-Hall, Englewood Cliffs (1996)
4. Gonzalez, R.C., Woods, R.E.: Digital Image Processing. Prentice-Hall, Englewood Cliffs (2002)
5. Lee, J.-B., Park, J.-H., Lee, H.-J., Lee, W.-C.: Error Concealment Based on Semantic Prioritization with Hardware-Based Face Tracking. ETRI Journal 26(6), 535–544 (2004)