TM影像在湖泊湿地信息提取中的最佳波段组合

The Optimal Bands Combination of TM Image Using in Extracting Information of Lake Wetland

以湖泊湿地信息提取为研究目的,通过分析各波段光谱信息及其之间的相关系数,应用最佳指数法,同时参考地物光谱特征曲线以及各波段主要应用范围,对安徽菜子湖TM影像的最佳波段组合来进行了研究。结果表明:3、4、5波段的信息量最为丰富,其波段间相关性最小,OIF值高;同时经过反复比较R、G、B假彩色合成方案,最终选择TM453作为最佳波段组合,这样的多光谱合成影像能够最大程度地反映菜子湖湿地信息,为提高信息提取的精度和工作效率提供重要依据。

In this paper ,spectrum characteristics and its correlation, the research objects and the use of TM on Landsat 5,the optimum index factor and the typical spectral image feature curve were applied to analyze the TM multi-spectral band combination for lake Wetland information extraction, the TM data was for Lake Caizi, Anhui province. The results showed that the 345 band selection is imformative,the correlation between bands is minimal,the index of OIF is high,so it was the optimal band selection for wetland information extraction. The TM453 combination which is the best after R, G, B composed can provide wetland information to the biggest, this must be advantageous to eye estimation and provides a reliable reference.