Warthog

说明：  本程序引用Dowson N所写，应用于图像匹配，适用linux系统下，其中包含： 6个相似函数(平方差和、标准化相关、标准MI、后Parzen MI、in-Parzen MI和部分体积估计MI) 4翘曲函数(平移、旋转、相似和仿射) 5种优化方法(单纯形法、鲍威尔方向集法、共轭梯度法、变度量法和Levenberg-Marquardt法)。后三种算法使用解析导数，提高了算法的性能。
(6 similarity functions (Sum of Square Differences, Normalised Correlation, standard MI, Post-Parzen MI, In-Parzen MI, and Partial Volume Estimated MI) 4 warp functions (Translation, Rotation, Similarity and Affine) 5 optimisation methods (Simplex, Powell's Direction Set Method, Conjugate Gradients Method, Variable Metric Method and Levenberg-Marquardt). Analytic derivatives are used in the latter 3 algorithms giving much faster performance.)