First Photon-detection Ghost imaging for weak light imaging

We propose a novel imaging method using the Ghost Imaging (GI) in a photon limited imaging. In this report, in order to obtain image using few photons, the First Photon-detection Time (FPT) is applied to the GI. The proposed signal detection method is able to obtain a signal with only 1 photon. The FPT has variations that are due to a shot noise. Using a correlation, effect of the noise on images is removed. As a result, the GI with FPT (FPGI) was able to obtain high quality image than a conventional imaging method using same photon number. Furthermore, to improve the detection time, we modified machine learning to reduce the measurement number in the view point of noise influence.