中文说明：内含n-findr端元提取，基于凸壳改进的n-findr方法的matlab代码。利用已经进行波段压缩后的图像进行端元提取，该方法需要人为指定要提取的端元数。详细部分见代码注释即可。
English Description：
Intron N-FINDR endmember extraction, N-FINDR convex hull method based on improved matlab code. The use of image band has compressed for endmember extraction, this method need artificially specified number of endmembers extracted. Detailed code comments can be see.