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Filmrestoratin using extended ACE

Filmrestoratin using extended ACE. Jon Anders Øvern. Introduction. Restoration of old film. Introduction. Restoration of old film using ACE (Automatic Equilization Algorithm). Introduction. Restoration of old film using ACE (Automatic Equilization Algorithm) Form and implement extension.

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Filmrestoratin using extended ACE

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  1. Filmrestoratin using extended ACE Jon Anders Øvern

  2. Introduction • Restoration of old film

  3. Introduction • Restoration of old film • using ACE (Automatic Equilization Algorithm)

  4. Introduction • Restoration of old film • using ACE (Automatic Equilization Algorithm) • Form and implement extension

  5. Introduction • Restoration of old film • using ACE (Automatic Equilization Algorithm) • Form and implement extension • Experiment and quality analysis

  6. Film restoration • Old, faded films • Cannot be restored chemically • Highly automated digital restoration algortithm wanted

  7. Human Visual System • Aquisition and interpretation of light • Eye / vortex

  8. Human Visual System • Adaption mechanics • WP • GW

  9. Color correction algorithms • Algortihms mimic some properties of the HVS to improve images • Global • Retinex, global/local WP algorithm

  10. ACE • General properties

  11. ACE • Difference / non-linear function

  12. ACE • Weighting function

  13. ACE • Display mapping

  14. ACE • My contribution: • Inter-frame considersation • Non-linear mapping function to avoid edges in the image

  15. ACE in film restoration • Flickering • Interframe consideration to reduce flickering

  16. Non-linear mapping

  17. Experiment • Setup / material

  18. Experiment • Results : La Rochelle

  19. Experiment • Results : Fire and Police

  20. Experiment • Results : Syntheic

  21. Experiment • Results : Non-linear mapping

  22. Conclusion • ACE extension works

  23. Future work

  24. Thanks to : • Ivar Farup • Jon Yngve Hardeberg • Alessandro Rizzi • Carlo Gatta

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