Jang Jinbeum, Park Sangwoo, Jo Jieun, Paik Joonki
Opt Express. 2016 Jun 13;24(12):12868-78. doi: 10.1364/OE.24.012868.
Conventional stereo matching systems generate a depth map using two or more digital imaging sensors. It is difficult to use the small camera system because of their high costs and bulky sizes. In order to solve this problem, this paper presents a stereo matching system using a single image sensor with phase masks for the phase difference auto-focusing. A novel pattern of phase mask array is proposed to simultaneously acquire two pairs of stereo images. Furthermore, a noise-invariant depth map is generated from the raw format sensor output. The proposed method consists of four steps to compute the depth map: (i) acquisition of stereo images using the proposed mask array, (ii) variational segmentation using merging criteria to simplify the input image, (iii) disparity map generation using the hierarchical block matching for disparity measurement, and (iv) image matting to fill holes to generate the dense depth map. The proposed system can be used in small digital cameras without additional lenses or sensors.
传统的立体匹配系统使用两个或更多数字成像传感器生成深度图。由于成本高和尺寸大，小型相机系统难以使用。为了解决这个问题，本文提出了一种使用带有相位掩膜的单个图像传感器进行相差自动聚焦的立体匹配系统。提出了一种新型的相位掩膜阵列模式，以同时获取两对立体图像。此外，从原始格式的传感器输出生成抗噪声深度图。所提出的方法包括四个步骤来计算深度图：（i）使用所提出的掩膜阵列获取立体图像，（ii）使用合并准则进行变分分割以简化输入图像，（iii）使用分层块匹配进行视差测量来生成视差图，以及（iv）图像抠图以填充空洞以生成密集深度图。所提出的系统可用于无需额外镜头或传感器的小型数码相机。
