This code is create integral image from gray scale image (gray scale only). It used openCV function build in visual C++ 32 application console.

复化Simpson积分公式和复化梯形积  分公式计算积分的通用程序 -Complexification Simpson integral formula and Trapezoidal integration formula integral general program

用面积累加的方法求解积分函数的结果，可以自由的输入积分上下限，以及分割段数-The results accumulated by the area method for solving integral function, you can enter upper and lower limits of freedom points, and the number of divided segments

积分经常会用到，所以特意将其用MPI写成并行代码，供大家参考，多多指教。-the ralization of integral algoritm by mpi