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• W4313009664 abstract "Flash illumination is widely used in imaging under low-light environments. However, illumination intensity falls off with propagation distance quadratically, which poses significant challenges for flash imaging at a long distance. We propose a new flash technique, named “patterned flash”, for flash imaging at a long distance. Patterned flash concentrates optical power into a dot array. Compared with the conventional uniform flash where the signal is overwhelmed by the noise everywhere, patterned flash provides stronger signals at sparsely distributed points across the field of view to ensure the signals at those points stand out from the sensor noise. This enables post-processing to resolve important objects and details. Additionally, the patterned flash projects texture onto the scene, which can be treated as a structured light system for depth perception. Given the novel system, we develop a joint image reconstruction and depth estimation algorithm with a convolutional neural network. We build a hardware prototype and test the proposed flash technique on various scenes. The experimental results demonstrate that our patterned flash has significantly better performance at long distances in low-light environments. Our code and data are publicly available. ( https://github.com/zhsun0357/Seeing-Far-in-the-Dark-with-Patterned-Flash )." @default.
• W4313009664 created "2023-01-05" @default.
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• W4313009664 date "2022-01-01" @default.
• W4313009664 modified "2023-10-18" @default.
• W4313009664 title "Seeing Far in the Dark with Patterned Flash" @default.
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• W4313009664 doi "https://doi.org/10.1007/978-3-031-20068-7_41" @default.
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