Cinematic camera emulation using two-dimensional color transforms

Jon S. McElvain; Walter Gish

doi:10.1117/12.2083266

27 February 2015 Cinematic camera emulation using two-dimensional color transforms

Jon S. McElvain, Walter Gish

Proceedings Volume 9404, Digital Photography XI; 94040I (2015) https://doi.org/10.1117/12.2083266
Event: SPIE/IS&T Electronic Imaging, 2015, San Francisco, California, United States

Abstract

For cinematic and episodic productions, on-set look management is an important component of the creative process, and involves iterative adjustments of the set, actors, lighting and camera configuration. Instead of using the professional motion capture device to establish a particular look, the use of a smaller form factor DSLR is considered for this purpose due to its increased agility. Because the spectral response characteristics will be different between the two camera systems, a camera emulation transform is needed to approximate the behavior of the destination camera. Recently, twodimensional transforms have been shown to provide high-accuracy conversion of raw camera signals to a defined colorimetric state. In this study, the same formalism is used for camera emulation, whereby a Canon 5D Mark III DSLR is used to approximate the behavior a Red Epic cinematic camera. The spectral response characteristics for both cameras were measured and used to build 2D as well as 3x3 matrix emulation transforms. When tested on multispectral image databases, the 2D emulation transforms outperform their matrix counterparts, particularly for images containing highly chromatic content.

Citation Download Citation

Jon S. McElvain and Walter Gish "Cinematic camera emulation using two-dimensional color transforms", Proc. SPIE 9404, Digital Photography XI, 94040I (27 February 2015); https://doi.org/10.1117/12.2083266

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