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Secure Layer Based Compound Image Compression using XML Compression

Secure Layer Based Compound Image Compression using XML Compression. Author : D. Maheswari 1, V.Radha Source : Computational Intelligence and Computing Research (ICCIC), 2010 Advisor : Wen -Jan Chen Speaker : Hui-chun Su. Outline. Introduction Methodology Experimental result

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Secure Layer Based Compound Image Compression using XML Compression

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  1. Secure Layer Based Compound Image Compression using XML Compression Author:D. Maheswari 1, V.Radha Source:Computational Intelligence and Computing Research (ICCIC), 2010 Advisor:Wen-Jan Chen Speaker:Hui-chun Su

  2. Outline • Introduction • Methodology • Experimental result • Conclusion

  3. Introduction CGI • Digital image compression • Reduction to save storage space • Reduce transmission rate requirements • Compound images • Computer generated images (CGI) • Text images (TI) • Scanned images (SI) • Document images (DI) TI SI DI

  4. Introduction • Compressing compound images • Single algorithm • Elusive data types • Segmentation data • Similar data types • Lowers the bit rates • Lowers the level of distortion

  5. Introduction • Segmentation algorithms • Object-based • Block-based • Layer-based • XML Compression for Compound Images(XMLCC) • Compression • Secure transmission

  6. Introduction • The work’s three phase • MRC based segmentation • Foreground (FG) • Background (BG) • Mask • Compressed • FG using XML compression • BG using JPEG • Secure transmission

  7. Outline • Introduction • Methodology • Experimental result • Conclusion

  8. Methodology • MRC segmentation • Pre processing • Block transformation • Compression • Encryption

  9. Methodology • MRC Segmentation • Foreground (FG) • Textual elements • Background (BG) • White space and picture elements • Mask • Binary mask • Pixel's state

  10. Methodology • Pre processing • Halo effect • Layer based technique • Data filling algorithm • Enhance compression.

  11. Methodology • Block transformation • Rearranges the image data • Step 1. matrix transpose • Step 2. clockwise rotation • Angle θ • Step 3. flips the matrix • Horizontally(rows) and vertically(columns) • Step 4. converting pixel values • Adding a value in odd and even columns (8 and 4) • Step 5. stores two separate images (odd and even)

  12. Methodology • Block transformation • Step 1. matrix transpose

  13. Methodology • Block transformation • Step 2. clockwise rotation

  14. Methodology • Block transformation • Step 3. flips the matrix (horizontally)

  15. Methodology • Block transformation • Step 3. flips the matrix (vertically)

  16. Methodology • Block transformation • Step 4. converting pixel values

  17. Methodology • Block transformation • Step 5. stores two separate images (odd and even) Original image Odd columns Even columns

  18. Methodology • Compression • FG layer : using an XML compressor • XML-specific compression tool as called Xmill • Separate structure from data • Group related data items • Apply semantic compressors • BG layer: using JPEG 2000

  19. Methodology • Encryption • Insure security • Shuffle Encryption Algorithm

  20. Outline • Introduction • Methodology • Experimental result • Conclusion

  21. Experimental result • The system was compared with compression ratio, time and PSNR values. • All the experiments were conducted using a Pentium IV dual processor with 512 MB RAM. • All the images were of the size 256x 256 pixels.

  22. Experimental result

  23. Experimental result

  24. Experimental result CT : compression time DT : decompression time

  25. Outline • Introduction • Methodology • Experimental result • Conclusion

  26. Conclusion • Higher compression • Lower distortion • Security for image data transferred

  27. The End

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