HJ-1卫星CCD图像信噪比评估 |
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引用本文: | 张璐,黄吴蒙,张悦,徐永明,周婵. HJ-1卫星CCD图像信噪比评估[J]. 地理空间信息, 2013, 0(3): 73-75 |
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作者姓名: | 张璐 黄吴蒙 张悦 徐永明 周婵 |
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作者单位: | 南京信息工程大学遥感学院,江苏南京,210044 |
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基金项目: | 国家自然科学基金资助项目(41201369);江苏省高等学校大学生实践创新训练计划资助项目;南京信息工程大学实验室开放资助项目。 |
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摘 要: | 采用基于边缘块剔除的局部方差法对我国HJ-1环境卫星CCD图像的信噪比进行了评估,选取满足噪声评估环境的图像,分析了HJ-1/CCD影像各个波段的信噪比特征。结果表明,HJ-1/CCD影像第3波段信噪比最高,第4波段相对较低;与美国Landsat/TM图像相比,HJ-1/CCD图像信噪比整体上更高。
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关 键 词: | 信噪比 HJ-1卫星 CCD图像 |
Estimation of Signal-Noise-Ratio for HJ-1/CCD Data |
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Abstract: | The improved local means and local standard deviations method was employed to estimate the SNR of HJ-1/CCD data in this paper.Taking the HJ-1/CCD image acquired on June 26,2011 in Jiuquan area as the test image,the characters of SNR for all HJ-1/CCD bands were analyzed.Result shows that the SNR are different for different HJ-1/CCD bands.Band 3 shows the highest SNR while band 4 shows the lowest SNR.Comparison with the Landsat/TM indicates that HJ-1/CCD exhibits higher SNR except for band 4. |
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Keywords: | SNR HJ-1 environmental satellite CCD image |
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