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Towards perceptual uniformity and HDR-WCG image processing: a projection-based color space
Optics Express
|November 22, 2024
Summary
A new perceptually uniform color space is introduced for high dynamic range (HDR) and wide color gamut (WCG) images. This novel color space significantly improves image processing performance and perceptual uniformity compared to existing methods.
Area of Science:
- Image Processing
- Computer Vision
- Color Science
Background:
- High dynamic range (HDR) and wide color gamut (WCG) images are increasingly common.
- Existing color spaces face challenges in effectively processing these advanced image formats.
- Perceptual uniformity is crucial for accurate color image processing and vision applications.
Purpose of the Study:
- To propose a novel, perceptually uniform color space tailored for HDR and WCG image processing.
- To optimize the color space for both perceptual uniformity and image application crosstalk characteristics.
Main Methods:
- Reconstruction of the color space using two 3D projection transformation matrices.
- Incorporation of a modified nonlinear function to enhance perceptual uniformity.
- Design of optimization objectives focusing on perceptual uniformity and crosstalk reduction.
Main Results:
- The proposed color space demonstrated superior perceptual uniformity.
- Evaluated using metrics like STRESS, PU-PSNR, PU-SSIM, and HDR-VDP-3.
- Outperformed 7 existing color spaces in comprehensive image processing tests.
Conclusions:
- The developed color space offers significantly improved overall performance for HDR and WCG images.
- It addresses the limitations of current color spaces in handling advanced image content.
- This advancement is vital for future color image processing and visual applications.
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