关键词: 球状全景图, 快速傅立叶变换, 分段三次插值

Abstract: Nowadays，there is few methods for spherical panoramic mosaics which can cover all the visual range，and the existing ones have some limitations，such as instable iterative optimizations，and particular imaging equipments.In order to solve these problems，this paper presents a new approach to create spherical panoramas automatically，and the input images are just acquired by general equipments.This approach adopts the FFT-based phase-correlation algorithm to compute the transform relationships between images approximately.For avoiding the error accumulations during the stitching process，it creates a set of longitudinal-block images from the input images，which finally are stitched to a spherical panorama by the piecewise interpolation strategy.In many situations，the experimental results demonstrate that this approach has high efficiency，and gain high-quality mosaics.

Key words: spherical panoramas, Fast Fourier Transform（FFT）, piecewise cubic interpolation