Super-resolution thermal ghost imaging based on deconvolution

Abstract

The resolution of classical imaging is limited by the Rayleigh diffraction limit, whereas ghost imaging can overcome this diffraction limit and enhance the resolution. In this paper, we propose a super-resolution thermal ghost imaging scheme based on deconvolution, which can further improve the imaging resolution. Because the traditional thermal ghost imaging result is the convolution between the original image of the object and the correlation function, we can use deconvolution algorithm to decrease the effect of convolution and enhance the imaging resolution. Actually, the correlation function of ghost imaging system is just the point spread function (PSF) of classical imaging system. However, PSF is hard to obtain in classical imaging system, and it is easy to obtain in ghost imaging system. So deconvolution algorithm can be easily used in the ghost imaging system, and the imaging resolution can increases 2–3 times in practice.