Robust Reflectance Estimation for Projection-Based Appearance Control in a Dynamic Light Environment
Robust Reflectance Estimation for Projection-Based Appearance Control in a Dynamic Light Environment
复制标题
动态光环境中基于投影的外观控制的鲁棒反射率估计
DOI：
10.1109/tvcg.2019.2940453
复制
发表时间：
2019
影响因子：
5.2
通讯作者：
Sandor Christian and Kato Hirokazu
中科院分区：
文献类型：
--
作者：
Akiyama Ryo;Yamamoto Goshiro;Amano Toshiyuki;Taketomi Takafumi;Plopski Alexander;Sandor Christian and Kato Hirokazu
我们提出了一种新的方法，鲁棒地估计的反射率，即使在动态变化的光的环境中。为了通过使用投影仪-相机系统来控制对象的外观，对象的反射率的适当估计对于创建适当的投影图像是至关重要的。大多数传统的估计方法假设静态光条件;然而，在实践中，外观受到反射率和环境光的影响。在具有动态变化的光的环境中，常规的反射率估计方法需要在每次条件改变时进行校准。相比之下，我们的方法不需要额外的校准，因为它同时估计反射率和环境光。我们的方法是基于通过以高于人眼感知的速率切换投影来创建两种不同的光条件的概念，并在每个条件下分别捕获目标对象的图像。然后，通过使用在这两个条件下获取的一对图像来同时估计反射率和环境光。我们实现了一个投影仪相机系统，以120 Hz的频率打开和关闭投影。实验证实了我们的方法在改变环境光线时的鲁棒性。此外，我们的方法可以鲁棒地估计在实际的室内照明条件下的反射率。
We present a novel method that robustly estimates the reflectance, even in an environment with dynamically changing light. To control the appearance of an object by using a projector-camera system, an appropriate estimate of the object's reflectance is vital to the creation of an appropriate projection image. Most conventional estimation methods assume static light conditions; however, in practice, the appearance is affected by both the reflectance and environmental light. In an environment with dynamically changing light, conventional reflectance estimation methods require calibration every time the conditions change. In contrast, our method requires no additional calibration because it simultaneously estimates both the reflectance and environmental light. Our method is based on the concept of creating two different light conditions by switching the projection at a rate higher than that perceived by the human eye and captures the images of a target object separately under each condition. The reflectance and environmental light are then simultaneously estimated by using the pair of images acquired under these two conditions. We implemented a projector-camera system that switches the projection on and off at 120 Hz. Experiments confirm the robustness of our method when changing the environmental light. Further, our method can robustly estimate the reflectance under practical indoor lighting conditions.