Kikuchi diffraction pattern analysis is one of the essential techniques of transmission electron microscopy used in materials science. For instance, one important application is its use in crystal orientation determination. During the development of SAKI5 software for the simulation and analysis of Kikuchi patterns, two methods in the literature for crystal orientation determination from two independent Kikuchi pairs have been revisited and then implemented. This paper compares the formula derivations of these two methods, revealing their geometrical connections in terms of the optical path. The discussion is beneficial for electron microscopy researchers and students seeking insights into this research domain. A brief overview of a newly added module in SAKI5 software using these two methods is also provided, accompanied by a detailed example. Computational results indicate that better outcomes can be achieved by utilizing the average of both methods.

菊池衍射图分析是材料科学中使用的透射电子显微镜的基本技术之一。例如，一项重要的应用是其在晶体取向测定中的应用。在开发用于模拟和分析菊池图案的 SAKI5 软件期间，重新审视并实施了文献中用于确定两个独立菊池对晶体取向的两种方法。本文比较了这两种方法的公式推导，揭示了它们在光路方面的几何联系。这次讨论对于电子显微镜研究人员和寻求深入了解该研究领域的学生来说是有益的。还提供了使用这两种方法在 SAKI5 软件中新添加的模块的简要概述，并附有详细的示例。计算结果表明，利用两种方法的平均值可以获得更好的结果。