论文标题
Prolab：感知均匀的投影颜色坐标系
ProLab: perceptually uniform projective colour coordinate system
论文作者
论文摘要
在这项工作中，我们提出了Prolab：一种新的颜色坐标系，该系统衍生成CIE XYZ的3D投影转换。我们表明，根据由应力指标评估的感知均匀性，prob远远领先于广泛使用的Cielab坐标系（尽管不如现代CAM16-UCS）。同时，线性颜色空间标准的色度估计的角度误差也可以在prob中使用，因为投影转换保留了歧管的线性。与线性空间不同，不同色调的角误差根据prolab内的人类颜色歧视阈值进行标准化。我们还证明，Prolab中的射击噪声比CAM16-UCS或其他标准颜色空间更均一。这使得Prolab成为方便的坐标系，可以在其中进行线性颜色分析。
In this work, we propose proLab: a new colour coordinate system derived as a 3D projective transformation of CIE XYZ. We show that proLab is far ahead of the widely used CIELAB coordinate system (though inferior to the modern CAM16-UCS) according to perceptual uniformity evaluated by the STRESS metric in reference to the CIEDE2000 colour difference formula. At the same time, angular errors of chromaticity estimation that are standard for linear colour spaces can also be used in proLab since projective transformations preserve the linearity of manifolds. Unlike in linear spaces, angular errors for different hues are normalized according to human colour discrimination thresholds within proLab. We also demonstrate that shot noise in proLab is more homoscedastic than in CAM16-UCS or other standard colour spaces. This makes proLab a convenient coordinate system in which to perform linear colour analysis.
