中文说明：BEMD对图像进行分解，包络构造使用Delaunay三角剖分与三次插值，的的到分解的结果。输入：灰度bmp图像输出：imf1 imf2 imf3 残差
English Description：
The image is decomposed by BEMD, and the envelope is constructed by Delaunay triangulation and cubic interpolation. Input: gray BMP image output: imf1 imf2 imf3 residual