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Conference Publication

New procedures to evaluate visually lossless compression for display systems

Host Publication: SPIE Optics & Photonics 2017

Authors: D. F. Stolitzka, T. Bruylants and P. Schelkens

Publisher: SPIE

Publication Year: 2017

Number of Pages: 11


Abstract:

Visually lossless image coding in isochronous display streaming or plesiochronous networks reduces link complexity and power consumption and increases available link bandwidth. A new set of codecs developed within the last four years promise a new level of coding quality, but require new techniques that are sufficiently sensitive to the small artifacts or color variations induced by this new breed of codecs. This paper begins with a summary of the new ISO/IEC 29170DŽ, a procedure for evaluation of lossless coding and reports the new work by JPEG to extend the procedure in two important ways, for HDR content and for evaluating the differences between still images, panning images and image sequences.ISO/IEC 29170DŽ relies on processing test images through a well-defined process chain for subjective, forced-choice psychophysical experiments. The procedure sets an acceptable quality level to one just noticeable difference. Traditional image and video coding evaluation techniques, such as those used for television evaluation have not proven sufficiently sensitive to the small artifacts that may be induced by this breed of codecs. In 2015, JPEG received new requirements to expand evaluation of visually lossless coding for high dynamic range images, slowly moving images, i.e., panning, and image sequences. These requirements are the basis for new amendments of the ISO/IEC 29170DŽ procedures described in this paper. These amendments promise to be highly useful for the new content in television and cinema mezzanine networks.The amendments passed the final ballot in April 2017 and are on track to be published in 2018.

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