Fig. 1. Flowchart of bathymetry inversion

Fig. 2. Experimental sea area image and measured water depth distribution. (a) Ganquan island; (b) Langhua reef

Fig. 3. Inversion result diagram of AESM. (a)--(c) Langhua reef; (d)--(f) Ganquan island

Fig. 4. Scatter plot of retrieving water depth and measured water depth. (a)--(f) AESM results; (g)--(l) Log_ratio model results; (m)--(r) L-S model results

Fig. 5. Section of water depth. (a) Section of Ganquan island; (b) section of centerline 1 of Fig. (a); (c) section of centerline 2 of Fig. (a); (d) section of Langhua reef; (e) section of centerline 3 of Fig. (d); (f) section of centerline 4 of Fig. (d)

Fig. 6. Accuracy comparison of different models in different depth intervals. (a)--(c) Accurate segmented bar chart of Langhua reef; (d)--(f) accurate segmented bar chart of Ganquan island

Fig. 7. Correlation coefficient line chart and inversion precision bar chart of multi-model