Feng Wei, Zhang Fumin, Wang Weijing, Xing Wei, Qu Xinghua
Appl Opt. 2017 May 1;56(13):3831-3840. doi: 10.1364/AO.56.003831.
In this paper, we overcome the limited dynamic range of the conventional digital camera, and propose a method of realizing high dynamic range imaging (HDRI) from a novel programmable imaging system called a digital micromirror device (DMD) camera. The unique feature of the proposed new method is that the spatial and temporal information of incident light in our DMD camera can be flexibly modulated, and it enables the camera pixels always to have reasonable exposure intensity by DMD pixel-level modulation. More importantly, it allows different light intensity control algorithms used in our programmable imaging system to achieve HDRI. We implement the optical system prototype, analyze the theory of per-pixel coded exposure for HDRI, and put forward an adaptive light intensity control algorithm to effectively modulate the different light intensity to recover high dynamic range images. Via experiments, we demonstrate the effectiveness of our method and implement the HDRI on different objects.
在本文中，我们克服了传统数码相机动态范围有限的问题，并提出了一种从名为数字微镜器件（DMD）相机的新型可编程成像系统实现高动态范围成像（HDRI）的方法。所提出的新方法的独特之处在于，我们的DMD相机中入射光的空间和时间信息可以被灵活调制，并且通过DMD像素级调制使相机像素始终具有合理的曝光强度。更重要的是，它允许我们的可编程成像系统中使用不同的光强度控制算法来实现HDRI。我们实现了光学系统原型，分析了用于HDRI的逐像素编码曝光理论，并提出了一种自适应光强度控制算法，以有效地调制不同的光强度来恢复高动态范围图像。通过实验，我们证明了我们方法的有效性，并在不同物体上实现了HDRI。
