Data of Research on optimization method of underwater scattering imaging based on off-axis digital holography

This folder contains manuscript titled "Research on optimization method of underwater scattering imaging based on off-axis digital holography" and the detailed 20 figures of this project.Fig.1.Underwater off-axis digital hologram imagingFig.2.Flow chart of hologram reconstructionFig.3 4F system filtering schematic diagramFig.4 Simulation target and scattering medium. ( a ) Target image ; ( b ) Scattering mediaFig.5 Direct imaging and holographic imaging. (a) Direct imaging; (b) Hologram; (c) Reconstruction mapFig.6 Holographic imaging with or without 4F system. (a)holograms without 4F;(b) holograms with 4F; (c)reconstruction image without 4F ;(d) reconstruction image with 4F.Fig.7 Comparative analysis of hologram reconstruction effect under different light intensity. (a) 10×;(b) 100×；(c) 1000×;(d) 10000×.Fig.8 Three-dimensional sketch of Butterworth FilterFig.9 Three-dimensional schematic of the filter. ( a ) Ideal low-pass filter ( b ) Gaussian low-pass filterFig.10 Different filter reconstruction of the same hologram. (a) Ideal filter ; (b) Gaussian filter (c) Butterworth filterFig11.Underwater off-axis digital holographic imaging experimental setup based on 4F systemFig12 Imaging results of direct imaging and holographic imaging at different attenuation lengths(a)~(d) are the results of direct imaging.Fig13.The imaging results of holographic imaging with or without 4F system at different attenuation lengths.(a)~(d) are holograms without 4F system imaging. (e)~(f) are holograms with 4F system imaging.Fig14.The reconstruction results of holograms with or without 4F system holographic imaging system at different attenuation lengths. (a)~ (d) are the reconstruction of hologram without 4F system.  (e)~(f) are the reconstruction of hologram with 4F system.Fig.15 Holographic reconstruction images with different attenuations at different light intensity ratios.   (a)10x；(b)50x；(c)100x；(d)500xFig.16 Comparison of holographic reconstruction images with different attenuations at different reference light intensity ratios. (a)10x；(b)50x；(c)100x；(d)500xFig.17 The reconstruction results of different filter holograms at different attenuation lengths (a)Butterworth low-pass filter;(b)Ideal low pass filter;(c)Gaussian low pass filterFig.18. Comparison of different filter reconstruction indexes of holograms at different attenuations.（a）SSIM;（b）PSNR（c）RMSEFig.19. Reconstruction results of maximum attenuation length.(a)10.4AL;(b)10.3AL