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In this paper, we introduce a method to solve the perspective-2-point problem by using a three-axis orientation sensor. We evaluate the performance of this approach, at first, theoretically via a simulator; then experimentally, in order to show the coherence of the theoretical results. During the experimentation, the performance of the proposed method is compared with other well known algorithms using more feature points. We establish that, using an affordable three-axis orientation sensor, the accuracies are comparable; in addition the proposed method is faster.