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

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.