The visual sensation of gloss is built on cues deduced from the interaction between light, surfaces sunder evaluation, and surrounding conditions. Gloss is a second‐order attribute of the visual appearance, this means that its perception is not directly encoded on biological sensors but constructed from the global scene in the field of view of the observer. It is then a complex quantity to measure. When most studies based on simulated samples stress on the importance of realistic observation conditions, we measure the effect of environment complexity over perception of real samples. We test two different lighting conditions: either diffuse or a combination of diffuse and collimated lighting in order to approach natural complex illumination patterns. Under both lighting conditions, we test two environments: a standard black light booth, designed according to the ASTM D4449, and a realistic office cubicle. Samples consist in a seven‐level gloss scale ranging from full matt to high gloss. These are presented to observers through pair comparison protocol, according to a maximum likelihood difference scaling algorithm. Our results confirm that gloss constancy is maintained even if the convergence of illumination varies. We however measure that the constancy is lost for matt samples perception.

中文翻译：

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在漫反射和镜面照明下评估光泽度

光泽的视觉感官是根据光线，表面凹陷评估和周围环境之间的相互作用得出的线索建立的。光泽度是视觉外观的次要属性，这意味着它的感知力不是直接在生物传感器上编码的，而是从观察者视野中的全局场景构建的。因此，它是一个复杂的量度。当大多数基于模拟样本的研究强调现实观察条件的重要性时，我们将测量环境复杂性对真实样本感知的影响。我们测试两种不同的照明条件：漫射照明或漫射照明与准直照明的组合，以逼近自然的复杂照明模式。在两种照明条件下，我们都会测试两种环境：标准的黑光棚，根据ASTM D4449进行设计，并具有逼真的办公隔间。样品包括从全哑光到高光泽度的七级光泽度等级。根据最大似然差缩放算法，通过对比较协议将这些呈现给观察者。我们的结果证实，即使照明的会聚变化，也能保持光泽恒定。但是，我们测量的结果是，对于亚光样本的感知失去了恒定性。