Compressed ultrafast photography (CUP) is currently the fastest receive-only ultrafast imaging technique with snapshot. CUP can capture non-repetitive transient events through three-dimensional (3D) image reconstruction based on a compressed sensing (CS) algorithm. However, CUP is a lossy imaging technique via image encoding and decoding, so how to further improve the image reconstruction accuracy has always been a goal pursued by scientists. Here, we develop a novel design of multichannel-coupled CUP (i.e. MC-CUP) to improve the image reconstruction accuracy. MC-CUP can not only increase the sampling rate, but also keep the snapshot of CUP. To demonstrate the advantage of MC-CUP in the image reconstruction accuracy, we measure a spatially modulated picosecond laser pulse and a 3D stepped structure, and these experimental results confirm that MC-CUP can significantly improve the spatial and temporal resolutions compared to CUP. This study will further promote the practical appli...

中文翻译：

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多通道耦合压缩超快摄影

压缩超快摄影（CUP）是目前最快的仅接收超快成像技术，包括快照。CUP可以通过基于压缩感知（CS）算法的三维（3D）图像重建来捕获非重复性瞬态事件。然而，CUP是一种通过图像编码和解码的有损成像技术，因此如何进一步提高图像重建精度一直是科学家追求的目标。在这里，我们开发了一种新颖的多通道耦合CUP（即MC-CUP）设计，以提高图像重建精度。MC-CUP不仅可以提高采样率，而且可以保留CUP的快照。为了证明MC-CUP在图像重建精度上的优势，我们测量了空间调制的皮秒激光脉冲和3D阶梯结构，这些实验结果证实，与CUP相比，MC-CUP可以显着提高时空分辨率。这项研究将进一步促进实际应用。