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Image and Video Compression for HDR Content

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons79441

Reinhard,  Erik
Computer Graphics, MPI for Informatics, Max Planck Society;

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Zitation

Zhang, Y., Reinhard, E., Agrafiotis, D., & Bull, D. (2012). Image and Video Compression for HDR Content. In A. G. Tescher (Ed.), Applications of Digital Image Processing XXXV (pp. 0H1-0H13). Bellingham, WA: SPIE. doi:10.1117/12.931500.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-F36C-2
Zusammenfassung
High Dynamic Range (HDR) technology can offer high levels of immersion with a dynamic range meeting and exceeding that of the Human Visual System (HVS). A primary drawback with HDR images and video is that memory and bandwidth requirements are significantly higher than for conventional images and video. Many bits can be wasted coding redundant imperceptible information. The challenge is therefore to develop means for efficiently compressing HDR imagery to a manageable bit rate without compromising perceptual quality. In this paper, we build on previous work of ours and propose a compression method for both HDR images and video, based on an HVS optimised wavelet subband weighting method. The method has been fully integrated into a JPEG 2000 codec for HDR image compression and implemented as a pre-processing step for HDR video coding (an H.264 codec is used as the host codec for video compression). Experimental results indicate that the proposed method outperforms previous approaches and operates in accordance with characteristics of the HVS, tested objectively using a HDR Visible Difference Predictor (VDP). Aiming to further improve the compression performance of our method, we additionally present the results of a psychophysical experiment, carried out with the aid of a high dynamic range display, to determine the difference in the noise visibility threshold between HDR and Standard Dynamic Range (SDR) luminance edge masking. Our findings show that noise has increased visibility on the bright side of a luminance edge. Masking is more consistent on the darker side of the edge.� (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.