After studying advantages and disadvantages of spectral angle mapper(SAM),a method has been developed which improves SAM classification with irradiance of objects.

• 根据光谱角制图信息增强方法的优缺点,通过对光谱照度的研究,提出了结合光谱角分类方法进行沿光谱照度方向距离分类的信息提取方法。