基于相位相关的全景图像拼接

全景图拼接是实现虚拟场景构建的一种重要方法。文章采用基于傅氏功率谱的频域相关技术来寻找相邻图像的重叠部分,首先将相机拍摄的实景照片投影到圆柱面上,以柱面图像的形式存储;然后精确定位相邻两张照片间的重叠位置并融合相邻图像的亮度,通过图像拼接形成完整的360°环境视景;采用互功率谱中的相位信息进行图像配准,对图像间的亮度变化不敏感,可以有效避免局部最优的现象;实验结果证明,该算法具有一定的抗干扰能力和较高的匹配精度。

Panoramic image mosaic based on domain correlation

In this paper,the overlapping part of adjacent images is sought by adopting the method which is based on the frequency domain in the Fourier power technology.First,the digital photos are projected to the cylindrical surface and registered,then the two adjacent images are mosaiced and the lightness is blended.By piecing together the images in sequence,the panoramic image of 360 degrees can be gained.The presented registration algorithm which uses phase information of domain correlation is non-sensitive to the lightness change,so that local optimum can be avoided effectively.Experiment results prove that this algorithm is robust and has certain capability of interference rejection and its matching accuracy is much higher.