论文信息 - Note: Improving low-light-level image detection sensitivity with higher speed using auxiliary sinusoidal light signal.

Note: Improving low-light-level image detection sensitivity with higher speed using auxiliary sinusoidal light signal.

An improved active imaging method, which upgraded the detection sensitivity by applying an auxiliary sawtooth wave light signal, was reported. Nevertheless, such method sacrificed the imaging speed. To speed up imaging, a sinusoidal light signal is used instead and superposed with the undetectable low-light-level signal on the image sensor. After acquiring a superimposed image set in one sine wave cycle, an unbiased low-light-level image estimation is obtained by using least-square optimization. Through probabilistic analysis and experimental study, we demonstrate that the sinusoidal signal could improve the detection sensitivity 1/3 faster than the sawtooth wave signal.

Zhengtao Yu | Hongying Tang | Zhengtao Yu | Hongying Tang

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