cospectral digraph

例句：

1. 1.In the study of remote sensing, cospectral digraphs are used to analyze the spectral properties of different materials.
   在遥感研究中，使用光谱协方差图来分析不同材料的成分。
2. 2.The cospectral digraph technique is a powerful tool for detecting and mapping changes in land cover over time.
   光谱协方差图技术是检测和绘制土地覆盖随时间变化的强大工具。
3. 3. The cospectral digraph approach has been shown to be effective in identifying and characterizing complex terrain features.
   研究表明，光谱协方差图方法能有效识别和描述复杂的地形特征。