Li Xianye, Yin Yongkai, He Wenqi, Liu Xiaoli, Tang Qijian, Peng Xiang
Opt Express. 2021 Oct 25;29(22):36675-36688. doi: 10.1364/OE.442520.
Single-pixel imaging (SPI) technique has been studied intensively due to its minimum requirement for the detector resolution and the equipment costs. In this work, we proposed a new strategy of the SPI to explore its capability in high-dimensional imaging, which is the first comprehensive scheme as we know to achieve calibration, color texture and viewpoint expansion of single-pixel three-dimensional imaging. We realized a low-cost single-pixel three-dimensional imaging scheme which employ a raster scanner to provide the structured illumination and a grating to encode the height information. In order to reduce the blocking area, we introduce two single-pixel detectors (SPDs) to detect from two detection angles, a modified total variation based criterion is proposed to fuse the height information from two SPDs and reduce the error of shape fusion. To acquire the information of higher dimension, we introduce the third SPD aims to gain the color texture, three bandpass filter is placed in front of three SPDs, respectively, to collect different color information. Meanwhile a viewpoint switching method inspired by the shape from shading theory is presented to improve the color fidelity. Our study is expected to provide a demonstration for SPI in acquisition, reconstruction, and fusion of high-dimensional image data.
单像素成像（SPI）技术因其对探测器分辨率和设备成本的最低要求而受到深入研究。在这项工作中，我们提出了一种新的SPI策略，以探索其在高维成像方面的能力，据我们所知，这是实现单像素三维成像的校准、颜色纹理和视角扩展的首个综合方案。我们实现了一种低成本的单像素三维成像方案，该方案采用光栅扫描仪提供结构化照明，并使用光栅对高度信息进行编码。为了减少遮挡区域，我们引入了两个单像素探测器（SPD）从两个检测角度进行检测，提出了一种基于改进全变差的准则来融合来自两个SPD的高度信息并减少形状融合误差。为了获取更高维度的信息，我们引入第三个SPD以获取颜色纹理，分别在三个SPD前放置三个带通滤波器以收集不同颜色信息。同时，提出了一种受明暗形状理论启发的视角切换方法以提高颜色保真度。我们的研究有望为SPI在高维图像数据的采集、重建和融合方面提供示范。
