To deal with edge blur and mosaic of current data visualization algorithmsa

a bi-cubic interpolation is incorporated into the sonar data visualization algorithm according to the imaging mechanism of multi-beam forward looking sonar.The 16 near echo-points of the interpolation point are determined

and their distance weights and angle weights are calculated.Finally

the weighted pixel value of all the 16 near echo-points is used as the pixel value of the interpolation point.Experiments on both simulation data and real data obtained by Gemini 720i forward-looking sonar show that the proposed algorithm has the advantages over current algorithms in terms of peak signal to noise ratio and edge-preserving effect

and thus can effectively improve image quality of visualization.