Color preservation for tone reproduction and image enhancement

Chengho Hsin; Zong Wei Lee; Zheng Zhan Lee; Shaw-Jyh Shin

doi:10.1117/12.2042432

3 February 2014 Color preservation for tone reproduction and image enhancement

Chengho Hsin, Zong Wei Lee, Zheng Zhan Lee, Shaw-Jyh Shin

Proceedings Volume 9015, Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications; 90150B (2014) https://doi.org/10.1117/12.2042432
Event: IS&T/SPIE Electronic Imaging, 2014, San Francisco, California, United States

Abstract

Applications based on luminance processing often face the problem of recovering the original chrominance in the output color image. A common approach to reconstruct a color image from the luminance output is by preserving the original hue and saturation. However, this approach often produces a highly colorful image which is undesirable. We develop a color preservation method that not only retains the ratios of the input tri-chromatic values but also adjusts the output chroma in an appropriate way. Linearizing the output luminance is the key idea to realize this method. In addition, a lightness difference metric together with a colorfulness difference metric are proposed to evaluate the performance of the color preservation methods. It shows that the proposed method performs consistently better than the existing approaches.

Citation Download Citation

Chengho Hsin, Zong Wei Lee, Zheng Zhan Lee, and Shaw-Jyh Shin "Color preservation for tone reproduction and image enhancement", Proc. SPIE 9015, Color Imaging XIX: Displaying, Processing, Hardcopy, and Applications, 90150B (3 February 2014); https://doi.org/10.1117/12.2042432

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KEYWORDS

RGB color model

High dynamic range imaging

Image enhancement

Databases

Image compression

Associative arrays

Curium

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