关键词: 全方位图像, 全景图, 展开, 双线性内插值法, 查表法

Abstract: Nearest neighbor method，the traditional arithmetic used in unwrapping omnidirectional images to panorama and perspective images，leads to low unwrapping quality，though it is simple.This paper introduces quadratic interpolation method to improve unwrapping quality.And trigonometrical function table checking method is referenced to reduce large arithmetic amount in the unwrapping process.According to the experiments，more sharper unwrapped images can be obtained using the method described in this paper.

Key words: omnidirectional image, panorama image, unwrap, quadratic interpolation method, table checking method