Fig. 2
From: Improving PSNR and computational efficiency in orthogonal ghost imaging

Part of the two sets of illumination patterns for \(m_{1}=m_{2}=8\) used in this paper. (a) Patterns generated by S(x, y; u, v) in Eq. (7), (b) Phase-shifted counterparts generated by \(S^{\prime }(x,y;u,v)\) in Eq. (7). These two groups form the basis of the differential acquisition strategy used to eliminate background noise.