拉普拉斯算子，实现边界锐化。拉普拉斯运算是偏导数运算的线性组合[4-6]，而且是一种各向同性（旋转不变）的线性运算。包含实验报告以及代码-Enhancement Using the Laplacian

(a) Use the programs developed in Projects 03-03 and 03-04 to implement the

Laplacian enhancement technique described in connection with Eq. (3.7-5). Use the

mask shown in Fig. 3.39(d).

(b) Duplicate the results in Fig. 3.40. You will need to download Fig. 3.40(a).