Film grain synthesis and its application to re-graining

Peter Schallauer; Roland Mörzinger

doi:10.1117/12.650694

17 January 2006 Film grain synthesis and its application to re-graining

Peter Schallauer, Roland Mörzinger

Proceedings Volume 6059, Image Quality and System Performance III; 60590Z (2006) https://doi.org/10.1117/12.650694
Event: Electronic Imaging 2006, 2006, San Jose, California, United States

Abstract

Digital film restoration and special effects compositing require more and more automatic procedures for movie regraining. Missing or inhomogeneous grain decreases perceived quality. For the purpose of grain synthesis an existing texture synthesis algorithm has been evaluated and optimized. We show that this algorithm can produce synthetic grain which is perceptually similar to a given grain template, which has high spatial and temporal variation and which can be applied to multi-spectral images. Furthermore a re-grain application framework is proposed, which synthesises based on an input grain template artificial grain and composites this together with the original image content. Due to its modular approach this framework supports manual as well as automatic re-graining applications. Two example applications are presented, one for re-graining an entire movie and one for fully automatic re-graining of image regions produced by restoration algorithms. Low computational cost of the proposed algorithms allows application in industrial grade software.

Citation Download Citation

Peter Schallauer and Roland Mörzinger "Film grain synthesis and its application to re-graining", Proc. SPIE 6059, Image Quality and System Performance III, 60590Z (17 January 2006); https://doi.org/10.1117/12.650694

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