基于多尺度信息综合的快速地图匹配算法研究

Study on a Highspeed Image Matching Algorithm Based on Multiscale Synthesis

针对航片数字地图与实时图像的景象匹配实时性问题 ,提出了一种快速地图匹配方法———基于多尺度信息综合的数字地图匹配算法。该算法采用了多尺度分析与综合的思想 ,通过实时图像和参考图像在多尺度信息下的综合变换以及在同一尺度下的比较、综合 ,并结合一般常规图像匹配算法中的粗匹配和精匹配方法 ,实现了真实匹配位置的快速逼近 ,有效地提高了图像匹配的速度。通过PC机软件模拟仿真 ,该算法在匹配精度和匹配速度上都达到了较满意的效果。

In the target location system of airscape digital terrain maps, the direct correlative matching speed in the image processing is hard to meet the requirements of the real-time target location and tracking, so it is important to improve the real-time characteristic of matching between digital maps of aviation image and real-time airscape image for the application of image matching algorithm. A new highspeed image matching algorithm which is based on multiscale analysis and synthesis for digital maps is presented in this paper, and the real-time image and digital map are transformed and compared synthetically on the same scale, then rough matching and fine matching in normal image matching method are introduced to realize the quick approacbh to real accurate matching position, so that the speed of images'matching is improved effectively and the final matching position is obtained. The simulation for the algoithm is made on the computer, and the results show that the proposed algorithm is effective and correct, the matching speed and accuracy are satisfactory.