| 尹展,郝玉军,张利军,卜鹏,徐思超.混合型强迫不变的遥感影像云雾阴影去除方法[J].矿产勘查,2022,13(4):490-496 |
| 混合型强迫不变的遥感影像云雾阴影去除方法 |
| Mixedforcing invariant method for removing cloud shadow from remote sensing imagery |
| 投稿时间：2021-08-12 |
| DOI：10.20008/j.kckc.202204013 |
| 中文关键词: 云雾阴影去除 混合型强迫不变 HSI彩色空间变换 波段组合 混合像元分解 |
| 英文关键词: cloud shadow removal mixed forced invariance HSI color space transformation band combination mixed pixel decomposition |
| 基金项目:本文受湖南省地质灾害调查项目“湖南省江华瑶族自治县1∶10000地质灾害调查和风险评价”资助。 |
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| 中文摘要: |
| 针对遥感影像中云雾阴影干扰地物判读问题,建立一种“波段组合+HSI彩色空间变换+强迫不变”混合型强迫不变技术可进行阴影去除。首先,利用“波段选择+HSI彩色空间变换”进行阴影因子识别,再计算出影像各波段与阴影之间的相关系数；其次,通过拟合曲线、滤波以及平滑,使得各波段光谱值不随阴影因子变化,与阴影无相关性,即强迫不变；最后依据混合像元分解理论分离出像素中的阴影贡献值,达到去除云雾阴影目的。实验表明,该方法能有效识别阴影空间范围,阴影遮挡地物能基本显现,影像可判读性提高,效果较好。 |
| 英文摘要: |
| Aiming at the problem that cloud shadow interferes with surface object interpretation in remote sensing image, a hybrid forced invariance technique of “band combination+HSI color space transformation+forced invariance” is established to remove the shadow. Firstly, “band selection+HSI color space transformation” is used to identify shadow factors, and then the correlation coefficient between each band and shadow is calculated; Then, by fitting the curve, filtering and smoothing, the spectral value of each band does not change with the shadow factor and has no correlation with the shadow; Finally, according to the mixed pixel decomposition theory, the shadow contribution value of the pixel is separated to remove the cloud shadow. The experimental results show that the method can effectively identify the shadow space range, the shadow occluded objects can basically appear, the image interpretability is improved, and the effect is good. |
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