Development and evaluation of gamut extension algorithms
Development and evaluation of gamut extension algorithms
复制标题
色域扩展算法的开发和评估
DOI：
10.1002/col.20537
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发表时间：
2009
影响因子：
1.4
通讯作者：
Jiangtao Kuang
中科院分区：
文献类型：
--
作者：
J. Laird;R. Muijs;Jiangtao Kuang
近年来，新的显示技术已经出现，能够产生超过广播标准色域的颜色。另一方面，目前大多数视频内容仍然符合EBU标准，因此，需要颜色映射算法来最佳地利用这些新显示器的更宽色域。为了确定合适的颜色映射策略，我们开发、实现并评估了几种色域扩展方法。针对参考（真彩色）映射评估了这些算法的显色性能和对不同图像内容的鲁棒性。为此，采用模拟和实际的宽色域显示器进行了两个心理物理实验。结果表明，首选算法对图像内容有一定的依赖性，特别是对带有肤色的图像。然而，在这两个实验中，有偏好显示的算法，平衡色度和亮度调制作为输入亮度的函数。新设计的扩展算法始终优于真彩色映射，从而证实了在宽色域显示上适当映射的好处。©2009 Wiley期刊公司应用科学学报，34 (4):444 - 451,2009
In recent years, new display technologies have emerged that are capable of producing colors that exceed the color gamut of broadcast standards. On the other hand, most video content currently remains compliant with the EBU standard and as such, there is a need for color mapping algorithms that make optimal use of the wider gamut of these new displays. To identify appropriate color mapping strategies, we have developed, implemented, and evaluated several approaches to gamut extension. The color rendering performance and robustness to different image content of these algorithms were evaluated against a reference (true-color) mapping. To this end, two psychophysical experiments were conducted using a simulated and actual wide-gamut display. Results show that the preferred algorithm had a dependency on image content, especially for images with skin tones. In both experiments, however, there was preference shown for the algorithm that balances chroma and lightness modulations as a function of the input lightness. The newly designed extension algorithms consistently outperformed true-color mapping, thus confirming the benefit of appropriate mapping on wide-gamut displays. © 2009 Wiley Periodicals, Inc. Col Res Appl, 34, 443–451, 2009