Research of echo image simulation in maritime radar simulator

To enhance radar image reality, the echo imaging model which could calculate the shadow of radar image and targets recognition, was built on the research of digital elevation model (DEM), radar echo principle and the factors that influenced radar echo intensity. The traditional scanline algorithm was improved to speed up image creation. Radar image is padded to enhance quality by K-NearestNeighbor (KNN) algorithm. It has been confirmed that the speed of real time image generation and display refresh can reach 60 frames per min, and a clear outline of the target is gotten. It completes radar function simulation with criterion of 12 turns per minute, which meets application requirements of ship simulator system.