Fig. 1. Schematic diagram of experimental setup

Fig. 2. Local speckle image of PSF. (a) Local speckle pattern of PSF at 530 nm; (b) local speckle pattern of PSF at 540 nm; (c) local speckle pattern of PSF at 550 nm

Fig. 3. Experimental analysis of PSF correlation. (a) Correlation between PSF at different wavelengths; (b) correlation between multiple groups of PSF at different wavelengths and PSF at 550 nm wavelength as a function of shrinking ratio

Fig. 4. Experimental results of object reconstruction of number "2" at 550, 540, and 530 nm by different methods. (a)‒(c) Reconstructed results of deconvolution of speckle images with point spread function at the wavelength of 550 nm; (d)‒(f) reconstructed results of the deconvolution of PSF with appropriate proportions; (g)‒(i) reconstructed results of deconvolution of PSF estimated with the weighted average algorithm

Fig. 5. Impact of different methods on the spectral imaging range. (a) Traditional deconvolution method; (b) scaling modulation method; (c) weighted average method

Fig. 6. Impact of different methods on the spectral imaging range under the same prior conditions. (a) Scaling modulation method; (b) weighted average method