The 3D micro morphology of the AM dot has fundamental impact on the quality of digital proof. It is significant to choose effective tool to restore the FM dot accurately. On the basis of restoring dots in the digital proof by SFS algorithm, we analyzed the influence of the paper condition on the ink absorption and collected the surface and vertical information of the digital proofs through scanning electronic microscope (SEM) for comparatively analyze the restoring result and the scans. The 3D model of the single FM dot and solid area in different proofs were restored accurately and intuitively. The analysis results from the different solid areas were consistent with those from SEM. In conclusion, dot models could truly reflect the dot characteristics in detail during the process of ink-jet printing. The SEM technology provided further scientific support for evaluating digital proof quality. The analysis of micro characteristics of FM dot has become an effective tool to better study the relations between micro characteristics and digital printing proofs.