1. 2003/11/251 A High Capacity Distortion-free Data Hiding Algorithm for Palette Image Circuits and Systems, 2003. ISCAS May ’ 03. IEE E CNF Authors: Liu Hongmei Zhang Zhefeng Huang Jiwu Huang Xialing Yun. Q. Shi Presented by Chia-Ming Chang

2. 2003/11/252 Outline Characteristics File Format Conventional File Format A Novel File Format Data Hiding Process Hiding High Capacity Data Capacity Prediction Experimental Results Conclusion

3. 2003/11/253 Characteristics Advantages: 1.Distortion-free 2.High capacity 3.Capacity predictable 4.Low computation complexity Drawback: 1.No security

4. 2003/11/254 Conventional File Format

5. 2003/11/255 A Novel File Format

6. 2003/11/256 Data Hiding Process

7. 2003/11/257 Data Hiding Process

8. 2003/11/258 Data Hiding Process

9. 2003/11/259 Data Hiding Process

10. 2003/11/2510 Hiding High Capacity Data

11. 2003/11/2511 Hiding High Capacity Data

12. 2003/11/2512 Hiding High Capacity Data

13. 2003/11/2513 Capacity Prediction

14. 2003/11/2514 Experimental Results(Gray Images) Image Resolution Color Use d Capacity of Hidden Data Maximal Proporti on 1 Bit/Colo r 2 Bit/Colo r 4 Bit/Colo r 256x256133317712824394119.251% 512x512194191281432952887.288% 720x576218267732028774546.439% 256x2562314332346610206.503%

15. 2003/11/2515 Experimental Results(Medical Images)

16. 2003/11/2516 Conclusion The property of security must be added in the proposed approach.