18 January 2010 Characteristic of color gamut related with MPEG2 compression
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Abstract
Image compression techniques such as JPEG and MPEG induce losses of image quality. Representative specifications are blocking artifact, color bleeding, and smearing. These losses are usually investigated on the spatial distortions from reconstructed images such as MSE(mean square error) and PSNR(peak signal to noise ratio). However, color information is practically influenced by compression techniques. The distortion of color information is shown as distorted information of gamut characteristics such as gamut size in the reconstructed images. Accordingly, this paper introduces the investigation of the relationship between image compression and the gamut characteristics for MPEG-2 compression. Some image quality metrics are introduced; gamut size and gamut fidelity using unique color and CDI (color distribution index), respectively. The influence of moving object is first observed with time sequential. Then, deterioration due to the variation of bit rate is observed using gamut size and gamut characteristics. Results shows the moving objects do not influence a lot to the gamut characteristic, however, the decrease of bit rate gives lots of deterioration for gamut characteristics shown as the variation of CDI.
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Tae-Hyoung Lee, Tae-Hyoung Lee, Yeong-Ho Ha, Yeong-Ho Ha, "Characteristic of color gamut related with MPEG2 compression", Proc. SPIE 7529, Image Quality and System Performance VII, 75290W (18 January 2010); doi: 10.1117/12.838837; https://doi.org/10.1117/12.838837
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