A ghost imaging method based on multi-frequency fusion

To improve the quality of optical imaging, this paper proposes a ghost imaging method based on multi-frequency fusion. First, filter is used to decompose the illumination field into illumination information of low frequency and high frequency (horizontal, vertical and diagonal directions), which is irradiated to the target object through the ghost imaging system. The detector receives the high- and low-frequency information of the object at the receiving end, and then demodulates it. Different fusion rules are used to fuse the received information in different frequency domains, and finally, the ideal image information is fusion-reconstructed. Simulation and experiment results verify that the fusion-reconstructed image obtained by this algorithm retains the characteristic information of the source image in different frequency domains, and provides a feasible and effective imaging algorithm. Graphical abstract