Simulation of mid-air images using combination of physically based rendering and image processing
Simulation of mid-air images using combination of physically based rendering and image processing
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DOI：
10.1007/s10043-022-00729-0
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发表时间：
2022-03
期刊：
影响因子：
1.2
通讯作者：
Ayami Hoshi;Shunji Kiuchi;Naoya Koizumi
中科院分区：
文献类型：
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作者：
Ayami Hoshi;Shunji Kiuchi;Naoya Koizumi
虽然使用光学模拟器设计空中成像系统是有益的，但使用模拟器需要光学知识，非专业人员无法掌握。为了创建一个非专业人员可以使用的设计辅助系统，我们展示了三种方法：一种从计算机图形渲染图像中提取空中图像和杂散光图像的方法，一种计算空中图像可见范围的方法，以及设计参数的评估。首先，考虑到在每个摄像机位置使用不同反射次数绘制的图像的差异，提取了一幅半空图像和一幅杂散光图像，然后计算了半空图像的可见范围；此外，对微镜阵列板（MMAP）与提取的半空图像之间的距离等参数进行了详细的调整，并考虑了提取的半空图像的可见范围。此外，为了证明所提出方法的有效性，我们改进了先前研究的设计以消除杂散光图像，并减小了现有系统的尺寸。与其他传统方法不同，利用提取的空中图像的可见范围而无需视觉检查，我们提出的方法能够提取空中图像和不需要的光，并评估光学系统。该技术可用于改进光学系统的设计和相关应用的检查。
Although it is beneficial to use an optical simulator to design a mid-air imaging system, the use of a simulator requires optical knowledge, and it cannot be handled by non-specialists. To create a design assistance system that can be used by non-specialists, we demonstrate three methods: a method for extracting mid-air images and images of stray light from computer graphics rendered images, a method for calculating the visible range of mid-air images, and an evaluation of design parameters. First, a mid-air image and an image of stray light are extracted by considering the differences of images rendered using different numbers of bounces at each camera position, after which the visible range of the mid-air image is calculated. In addition, other parameters, such as the distance between a micro-mirror array plate (MMAP) and the extracted mid-air image, are adjusted in detail and evaluated by considering the visible range of the obtained mid-air image. Moreover, to demonstrate the effectiveness of the proposed method, the design of the previous research was improved to eliminate images of stray light, and we reduced the size of the existing system. Unlike other conventional approaches, using the visible range of the extracted mid-air images and without the need for a visual check, our proposed method enables the extraction of mid-air images and unwanted light, and the evaluation of optical systems. This technique can be applied to improve the design of optical systems and in the examination of the related applications.