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

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

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

Human Visual System Aquisition and interpretation of light Eye / vortex

Human Visual System Adaption mechanics WP GW

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

ACE General properties

ACE Difference / non-linear function

ACE Weighting function

ACE Display mapping

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

ACE in film restoration Flickering Interframe consideration to reduce flickering

Non-linear mapping

Experiment Setup / material

Experiment Results : La Rochelle

Experiment Results : Fire and Police

Experiment Results : Syntheic

Experiment Results : Non-linear mapping

Conclusion ACE extension works

Future work

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