“…Color imaging can reach 10 -2 Lx low illumination conditions, gray imaging can reach 10 -3 Lx low illumination conditions. In order to obtain more realistic EMCCD true color low-light level images, Wang et al, Beijing Institute of Technology, proposed a color transfer method based on deep feature fusion [20] , in which single spectral and near-infrared images were acquired using the wheel filter as shown in Fig. 4 The image processed by the algorithm is significantly better than the original image in PSNR and SSIM, and significantly lower than the original image in color difference index, as shown in Fig.…”