Comparing two-step and one-step chromatic adaptation transforms using the CAT16 model
Comparing two-step and one-step chromatic adaptation transforms using the CAT16 model
复制标题
使用 CAT16 模型比较两步和一步色度自适应变换
DOI：
10.1002/col.22226
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发表时间：
2018
影响因子：
1.4
通讯作者：
Michael Pointer
中科院分区：
文献类型：
--
作者：
Changjun Li;Yang Xu;Zhifeng Wang;Ming Ronnier Luo;Guihua Cui;Manuel Melgosa;Michael H. Brill;Michael Pointer
颜色外观模型CIECAM 02和CAM 16通常包括两个一步色适应变换：将数据从第一光源转换为CIE光源E的正向（一步）变换，加上将结果从CIE光源E转换为第二光源的反向（一步）变换。然而，在实践中，也采用避免使用中间CIE光源E的一步色适应模型。使用一步CAT 16模型的测试表明，除了适应度D等于1的情况外，对称性和传递性都失败了。这些故障的大小取决于所选择的特定光源，并且随着适应程度的降低而增加。从四个可能的两步CAT16模型中，我们已经确定了两个遵守对称性和传递性特性的模型，其中一个具有文献中可用的实验对应颜色数据集的稍微更好的预测，并且与一步CAT16模型更一致。本文的研究结果证实，不完全适应，使用一步CAT是不正确的，我们建议使用两步CAT16模型是强制性的未来。
Color-appearance models, CIECAM02 and CAM16, usually include two one-step.chromatic adaptation transforms: a forward (one-step) transform to convert data.from a first illuminant to CIE illuminant E, plus a reverse (one-step) transform to.convert the results from CIE illuminant E to a second illuminant. In practice, however,.one-step chromatic adaptation models, that avoid the use of the intermediate.CIE illuminant E, are also employed. Tests using the one-step CAT16 model indicate.failures of both the symmetry and transitivity properties, except in the case.where the degree of adaptation D is equal to unity. The magnitude of these failures.depends on the specific illuminants selected, and increases as the degree of adaptation.decreases. From four possible two-step CAT16 models, we have identified two.that obey the symmetry and transitivity properties, one with slightly better predictions.of the experimental corresponding-color datasets available in the literature,.and more consistent with the one-step CAT16 model. The findings of this article.confirm that, for incomplete adaptation, the use of the one-step CAT is incorrect,.and we propose that the use of a two-step CAT16 model be mandatory for future.applications.