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Efficient luma modification-based chroma down-sampling and novel luma down-sampling with adaptive interpolation

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Abstract

In image/video processing, RGB to YUV transformation plays an important role in bit-rate reduction by a down-sampling of (U, V). Luma down-sampling is the trade-off between bit rate and PSNR, so it is transmitted as it is. In this paper first, we proposed luma down-sampling (LDS) on the server side. On the client side, luma up-sampling has been done by even distribution error (EDE) which introduced 5–7% PSNR lag. To improve PSNR, we proposed adaptive interpolation for luma (AIL) which improves up to 2% PSNR from EDE. LDS and AIL are suitable for low-cost applications. To improve PSNR, in conventional down-sampling format 4:2:2, 4:2:0, etc., we proposed bilinear-based efficient chroma up-sampling (BECU). BECU methods require eight neighbouring pixels where some pixels are up-sampled from the client side and some pixels are already down-sampled values at client side by BECU. This improves the PSNR and then bilinear interpolation-based chroma up-sampling.

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Acknowledgements

The author would like to express his heartfelt gratitude to the supervisor for his guidance and unwavering support during this research for his guidance and support.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, PSN College of Engineering and Technology, Tirunelveli, Tamil Nadu, 627152, India

    A. Ahilan

  2. Department of Electronics and Communication Engineering, University College of Engineering, Tindivanam, Tamil Nadu, India

    B. Pradeep Khanth

  3. University College of Engineering Arni, Thiruvanamalai, Tamil Nadu, India

    R. Ezhilarasi

  4. Centre for Computational Imaging and Machine Vision, Department of Electronics and Communication Engineering, Sri Eshwar College of Engineering, Coimbatore, Tamil Nadu, 641202, India

    N. Muthukumaran

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  1. A. Ahilan
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  2. B. Pradeep Khanth
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Contributions

The authors confirm the contribution to the paper as follows: AA and BPK were involved in study conception and design; data collection was performed by RE; NM helped in analysis and interpretation of results; AA and BPK contributed to draft manuscript preparation; all authors reviewed the results and approved the final version of the manuscript.

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Correspondence to B. Pradeep Khanth.

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Ahilan, A., Pradeep Khanth, B., Ezhilarasi, R. et al. Efficient luma modification-based chroma down-sampling and novel luma down-sampling with adaptive interpolation. SIViP 18, 1415–1428 (2024). https://doi.org/10.1007/s11760-023-02814-6

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