| 摘要: |
| 提出了一种基于图像序列的飞行器接近角的估计方法.飞行器的接近角对于飞行器的着陆来说是一个非常重要的参数,是指飞行器在着陆时的飞行轨迹与地平面之间的夹角.飞行器在着陆时近似作平移运动,在这种情况下,图像上的极点称作FOE(focus-of-expansion),地平面的消失线被称作Horizon.首先给出了从已标定的图像序列中提取FOE和Horizon的方法,然后由这两个参数估计出飞行器的接近角.模拟实验和真实图像实验表明该方法是可行的. |
| 关键词: 飞行器接近角 FOE(focus-of-expansion) horizon |
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| 基金项目:Supported by the National Natural Science Foundation of China under Grant Nos.60075004, 60275009 (国家自然科学基金); the National High-Tech Research and Development Plan of China under Grant No.2002AA422230 (国家高技术研究发展计划(863)) |
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| A Vision Based Method for Aircraft Approach Angle Estimation |
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ZHU Hai-Jiang,WU Fu-Chao,HU Zhan-Yi
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| Abstract: |
| An algorithm for estimating aircraft approach angle using computer vision is proposed in this paper. During the landing of an aircraft, the descent of the aircraft may be approximately considered as a pure translation motion. In this case the epipole has the same coordinates in all images and is called the Focus-of-Expansion (FOE), and the vanishing line of the ground plane is termed the Horizon. Furthermore, how the Focus-of-Expansion and the Horizon are extracted from a few calibrated sequential images is first introduced, then the aircraft approach angle is derived from these parameters. Simulated and real experiments validate this algorithm. |
| Key words: aircraft approach angle FOE (focus-of-expansion) horizon |
