视景图形绘制方法生成航海雷达图像关键技术  

Key technologies for generating narine radar image by scene rendering

作　　者：曹士连[1,2] 金一丞[1] 尹勇[1] 

机构地区：[1]大连海事大学航海动态仿真与控制交通行业重点实验室,辽宁大连116026 [2]集美大学航海学院,福建厦门361021

出　　处：《哈尔滨工程大学学报》2017年第5期711-718,790,共9页Journal of Harbin Engineering University

基　　金：国家高技术研究发展计划项目(2015AA016404);国家自然科学基金项目(51579114)

摘　　要：针对扫描线与岸线求交算法生成的航海雷达图像物标间遮挡关系不明确、陆地内部回波缺失问题,提出利用着色器程序计算雷达探测距离,通过绘制视景图形并提取帧缓存数据来生成仿真雷达图像。该方法利用纹理映射实现快速坐标转换和消除仿真图像的死点现象。对仿真图像中回波不连续问题进行了分析并提出了缓解措施。视景图形绘制方法生成雷达图像避开了求交计算的瓶颈,仿真结果表明,生成的雷达图像质量较现有模拟器有显著提高。To solve the problems o! object occlusion uncertainty and inland echo deficiency in marine radar images generated by the intersection o! scanning and coast lines, a method !or generating simulation radar images was pro-posed by calculating the radar detection distance in shader program, rendering 3D scenes and extracting frame buff-er data. Texture mapping was used to perform last coordinate transformation and to eliminate the dead point in the simulation radar image. The problem o! echo discontinuity was analyzed and some mitigation measures were pro-posed. The proposed method does not need to calculate the intersection o! the scanning and coast lines. T he simula-tion result shows that the quality of radar images is signi!icantly improved compared with the existing simulators.

关 键 词：雷达图像 图形绘制 透视投影 物标遮挡 死点 坐标转换 纹理映射 着色器 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]