| 基于粗阈值和梯度算法的南极多光谱影像云区的提取 |
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| 引用本文： | 鄂栋臣,陈刚.基于粗阈值和梯度算法的南极多光谱影像云区的提取[J].极地研究,2005,17(2):93-98. |
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| 作者姓名： | 鄂栋臣 陈刚 |
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| 作者单位： | 武汉大学中国南极测绘研究中心,武汉,430079 |
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| 基金项目： | 南极地理信息获取及环境动态过程研究资助项目（14601402024-04-06）. |
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| 摘 要： | 利用Landsat-7的ETM+多光谱影像,提出使用粗阈值以及梯度算法提取极地上空的云。试验结果表明,粗阈值增加了阈值算法的灵活性,并结合梯度算法,由粗到精,达到了较好的极地目标识别效果。
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| 关 键 词： | 云区提取 粗阈值 梯度算法 ETM+ |
| 收稿时间： | 2005年1月 |
| 修稿时间： | 2005年1月1日 |
CLOUD DETECTION OF MULTISPECTRAL IMAGES IN ANTARCTICA BASED ON WIDE THRESHOLD AND GRADIENT ALGORITHM |
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| E Dongchen,Chen Gang.CLOUD DETECTION OF MULTISPECTRAL IMAGES IN ANTARCTICA BASED ON WIDE THRESHOLD AND GRADIENT ALGORITHM[J].Chinese Journal of Polar Research,2005,17(2):93-98. |
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| Authors: | E Dongchen Chen Gang |
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| Abstract: | This work presents a new method for cloud detection in polar area based on the wide threshold and gradient algorithm using ETM + multispectral images. The approach identifies the cloud, shadow, ice sheet, glacial and bare rock through visible, IR and thermal images. More dynamic adaptation is given by the wide threshold and the gradient algorithm is combined to confine the ranges of cloud, shadow and ice sheet. The experiment result shows us the good efficiency of the algorithm. |
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| Keywords: | cloud detection wide threshold gradient algorithm ETM + |
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