Software Design For 3D Sonar Real-time Imaging System

The growth of marine science,water economy and their related industries makes underwater monitoring equipment increasingly important.Three-dimensional(3D)real-time imaging sonar has the advantages of real-time imaging and clear image,so it is of great engineering value to study 3D real-time imaging sonar system.As an important part of the 3D real-time imaging sonar system,the software of 3D sonar real-time imaging system is researched and designed in this thesis.The software includes data processing and visualization algorithm of sonar data.According to the direction of sonar data flow,the software can be divided into receiving module,preprocessing module,algorithm module,display module and parameter control module.The module uses semaphore to carry on the data synchronization and the cache sharing,which has reduced the software memory occupation,thus enhanced the software running efficiency.The software uses VTK's pipeline to realize 3D display of sonar data.Buffer area is designed for the software to prevent image jitter caused by the network fluctuation and operation speed difference.Modular programming and multi-threaded technology used in the software design reduce the coupling of the code and improve code scalability and maintainability.In addition,the sonar filtering algorithm is designed to reduce the noise of the original data while improving the speed and accuracy of the subsequent algorithm.Meanwhile improved max-flow/min-cut algorithm is designed to achieve interactive image segmentation in fixed area.On the basis of the realization of the algorithm,the design of the software takes the real-time imaging requirements into full account.The algorithm is expected to meet the requirements of real-time imaging in the test.