对信号的信息进行读取处理，算出各种特征值的东西(We read signal information and calculate various characteristic values)

IDL批量实现影像多单波段合成LayerStacking，并进行滤波SavitzkyGolayFilter，然后再拆分为单波段(IDL batch realizes image multi-single band synthesis LayerStacking, filters SavitzkyGolayFilter, and then splits into single bands)