土地利用分类中TM影像最佳波段组合选择研究

Optional Bands Combination of TM Image in Land Use Classification

土地利用和土地覆盖变化是全球变化的主要原因,也是生态安全的重要影响因素,遥感影像以其宏观、及时的特点为土地利用分类研究领域提供了重要数据.文章分析了TM影像各波段的光谱特征,运用均值、标准差和相关系数等指标定量分析TM数据各波段和波段之间的特征,用最佳指数(OIF)来衡量各种波段组合的信息量,确定五种波段组合方案,再结合TM影像的光谱特征,最后优选出345波段组合用于土地利用分类.

LUCC is the main reason of global change,also is the significant impact factor of ecological security. The Remote Sensing image supplies large amount of data because of it＇s characteritics of macroscopic and timely. The paper analyzes the spectral signature of every band, using average value, standard deviation and correlation coefficient, analyzes quantitatively the signature of every band and between bands of TM data, evaluates the information contents of every band combination with OIF, determines 5 kinds of bands combination primarily, then combines with the spectral signature of TM image and last makes a conclusion that the combination of 3,4,5 bands is optimal.