本文首先介绍了需要通过graph cut最小化的能量函数的特性。虽然是二进制变量但是很容易推广到其他方面。我们详细描述了通过graphcut最小化的能量函数。并提供了最小化能量函数的通用构建。最后给出了最小化二进制能量函数的必要条件。-In this paper, we give a characterization of the energy functions that can be minimized by graph cuts. Our results are restricted to functions of binary variables. We give a precise characterization of what energy functions can be minimized using graph cuts. We also provide a general-purpose construction to minimize such an energy function. Finally, we give a necessary condition for any energy function of binary variables to be minimized by graph cuts.