Space- and intensity-constrained reconstruction for compressed ultrafast photography.
Space- and intensity-constrained reconstruction for compressed ultrafast photography.
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DOI：
10.1364/optica.3.000694
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发表时间：
2016-07
期刊：
影响因子：
10.4
通讯作者：
Wang LV
中科院分区：
文献类型：
--
作者：
Zhu L;Chen Y;Liang J;Xu Q;Gao L;Ma C;Wang LV
单发压缩超快摄影（CUP）相机是世界上接收最快的相机。在这封信中，我们引入了外部CCD摄像头和一个空间和强度约束（SIC）重建算法，以提高杯子的图像质量。外部CCD摄像头拍摄动态场景的时间毫无用处的图像。与先前使用的无约束算法不同，该算法根据外部CCD摄像头提供的其他先前信息，同时合并了空间和强度约束。首先，从时间毫无用的图像中提取空间掩码，以定义作用区域。接下来，根据重建数据存储的时间投影图像与时间毫无用说的图像之间的相似性确定强度阈值。模拟和实验研究都表明，SIC重建改善了重建图像的空间分辨率，对比度和一般质量。
The single-shot compressed ultrafast photography (CUP) camera is the fastest receive-only camera in the world. In this Letter, we introduce an external CCD camera and a space- and intensity-constrained (SIC) reconstruction algorithm to improve the image quality of CUP. The external CCD camera takes a time-unsheared image of the dynamic scene. Unlike the previously used unconstrained algorithm, the proposed algorithm incorporates both spatial and intensity constraints based on the additional prior information provided by the external CCD camera. First, a spatial mask is extracted from the time-unsheared image to define the zone of action. Next, an intensity threshold is determined based on the similarity between the temporally projected image of the reconstructed datacube and the time-unsheared image. Both simulation and experimental studies show that the SIC reconstruction improves the spatial resolution, contrast, and general quality of the reconstructed image.