Abstract: Taking affine transformation for example, the influenc e of distribution and number of orientation points on accuracy of transformation coefficients is discussed in detail in this paper, and the conclusions are help ful to practice.

• 文摘:以仿射变换为例详细讨论了定向点的分布、数量对变换系数的精度影响，所得出的结论对实际工作具有指导意义。