| 一种航空影像阴影补偿方法 |
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| 引用本文： | 林宗坚,任超锋,姚娜,解斐斐.一种航空影像阴影补偿方法[J].武汉大学学报(信息科学版),2013,38(4):431-435. |
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| 作者姓名： | 林宗坚 任超锋 姚娜 解斐斐 |
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| 作者单位： | 1武汉大学遥感信息工程学院,武汉市珞喻路129号,430079)(2中国测绘科学研究院,北京市北太平路16号,100039 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 首先,对航空影像进行影像分割和阈值计算来预测阴影区域。其次，计算阴影区域的直射光与环境光的比值,同时，采用多波段合成方式实现阴影区域与非阴影区域之间的平滑过渡;最后，根据特定的阴影光照模型完成阴影补偿。实验结果表明，该方法不仅能有效补偿阴影，还能确保补偿后的阴影区域与非阴影区域平滑过渡。
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| 关 键 词： | 无人机影像 影像分割 阴影检测 阴影补偿 低通滤波 |
| 收稿时间： | 2013-03-16 |
| 修稿时间： | 2013-04-05 |
A Shadow Compensation Method for Aerial Image |
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| LIN Zongjian,REN Chaofeng,YAO Na,XIE Feifei.A Shadow Compensation Method for Aerial Image[J].Geomatics and Information Science of Wuhan University,2013,38(4):431-435. |
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| Authors: | LIN Zongjian REN Chaofeng YAO Na XIE Feifei |
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| Institution: | 1School of Remote Sensing and Information Engineering, Wuhan University, 129 Luoyu Road , Wuhan 430079 , China)(2Chinese Academy of Surveying and Mapping, 16 Beitaiping Road, Beijing 10039, China |
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| Abstract: | A shadow compensation method for aerial images is proposed. First, an image segmentation method is applied and the threshold value is calculated to help predict a shadow region. Then the ratio of direct light to ambient light pertaining to the shadow region is calculated. In the meantime, the multi-band blending method is adopted to realize a smooth transition from shadow region to non-shadow region. Finally, the shadow compensation is finished according to a certain illumination model. The experiments show that the proposed method can not only effectively compensate the shadow regions, but ensure a smooth transition from shadow to non-shadow regions. |
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| Keywords: | UAV image image segmentation shadow detection shadow compensation low-pass filter |
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