Fig. 1. Ablation mode (Transmitted-mode)

Fig. 2. Ablation pit image. (a) Upper and lower surfaces; (b) Side surfaces

Fig. 2. [in Chinese]

Fig. 3. Surface reflection model of SFS

Fig. 4. Principle of gray gradient constraint reconstruction

Fig. 5. Ablation pit shape. (a)Assuming the shape of the ablation pit;(b) Upper and lower surfaces of real ablation pits; (c) The side of the real ablation pit

Fig. 6. Principle of reconstruction algorithm

Fig. 7. Simulation results of semi-circular surface. (a) Semicircle surface; (b) Composite image; (c) Reconstruction surface; (d) Reconstruction error

Fig. 7. [in Chinese]

Fig. 8. Image of ablation pit. (a) A profile view; (b) Traditional volume method; (c) Reconstruction volume method; (d) Reconstruction plan; (e) Reconstruction of the top view

Fig. 9. Contrast ablation pit image. (a) A profile view; (b) Traditional volume method; (c) Reconstruction volume method; (d) Reconstruction plan; (e) Reconstruction of the top view