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航空影像中的阴影区域既提供了高大物体存在的证据,也为物体识别带来了困难。本文利用光照模型分析了阴影形成的机理和光度彩色不变量的局限性,结合城市彩色航空影像的特点和实际数据的分析,推导出城市彩色航空影像中阴影区域具有色调较高的特征,并据此提出了一种简便的城市彩色航空影像阴影检测方法。实验证明该方法是行之有效的。
Shaded areas in aerial video both provide evidence of the presence of tall objects and pose difficulties in object recognition. In this paper, we analyze the mechanism of shading and the limitation of photometric color invariant by using illumination model. Combining with the characteristics of urban color aerial image and the analysis of actual data, we deduce that the shaded area in city color aerial image has the characteristics of high color tone. According to This paper presents a simple city color aviation shadow detection method. Experiments show that the method is effective.