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。
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.
出处
《地理空间信息》
2013年第3期73-75,3,共3页
Geospatial Information
基金
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
