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以辽河三角洲地区为试验区，以１９９７ 年６ 月ＴＭ 图像为试验数据，利用灰度分析的方法，在充分分析了水体、沼泽植被、人工建筑等不同地物的光谱特征的同时，对比分析沼泽湿地各主要地物的光谱物征的差异，得出对于辽河三角洲地区，利用ＴＭ 图像进行湿地资源监测的波段组合为ＴＭ４、ＴＭ３、ＴＭ２ 三个波段，这样的波段组合可以使不同地物的灰度值差异达到尽量大的效果，既有利于目视解译，又有助于计算机自动分类
Taking Liao River Delta as experimental area and TM image of June, 1997 as test data, the spectral characteristics of different landforms such as water bodies, marsh vegetation and artificial buildings were analyzed by using the method of grayscale analysis. The marsh For the Liaohe River Delta region, the combination of TM4, TM3 and TM2 bands for the monitoring of wetland resources by TM images can be used to make the different gray matter To achieve the greatest degree of difference in the value of the effect, both conducive to visual interpretation, but also help the computer automatically classified