Enhancing motion picture lens performance by digital calibration and correction
Woollard, Christopher (2011) Enhancing motion picture lens performance by digital calibration and correction. Society of Motion Picture and Television Engineers Annual Technical Conference and Exhibition (SMPTE 2010). Curran Associates, Inc, NY, USA, pp. 135-143. ISBN 9781617821790
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To some degree, all lenses used by the motion picture industry exhibit certain distortions which can detract from the ideal viewing experience. This paper presents a lens calibration and correction system which enables these problems to be resolved digitally.
Lenses such as the Cook 4i and now 5i provide the necessary metadata on focus and aperture settings to enable digital post corrections to be applied. Many other lenses however may be adapted to provide the necessary metadata by means of an encoder. The paper presents how this is achieved followed by a presentation of the digital correction system for enhancing such scenarios as extreme focus pulls, chromaticity etc. Using digital high definition camera systems the calibration of each individual lens is presented along with the automatic derivation of the
required lens database. The full post production work flow through correction to final image generation is presented.
|Item Type:||Book Section|
|Additional Information:|| Proceedings of Society of Motion Picture and Television Engineers Annual Technical Conference and Exhibition 2010 (SMPTE 2010), held 26-28 October 2010, Hollywood, California, USA.|
|Uncontrolled Keywords:||lens distortions, lens breathing, barrel distortion, focus pull, lens correction, digital correction, metadata|
|Subjects:||Q Science > QA Mathematics|
T Technology > TR Photography
|School / Department / Research Groups:||School of Computing & Mathematical Sciences|
School of Computing & Mathematical Sciences > Department of Computer Systems Technology
|Last Modified:||17 Oct 2012 12:50|
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