在对图像复原模型进行简单介绍的基础上，利用变分基本引理推导出3个常用图像复原模型的Euler-lagrange方程，并对所得方程进行了证明。
Based on the brief introduction for image restoration and by using the variation basic lemma, we derive Euler-Lagrange equation from three common image restoration models. Then it proves its corresponding equation.
刘福保.图像复原模型的Euler-Lagrange方程[J].湖南工业大学学报,2009,23(2):55-57.