Research On Key Technology Of Spherical Panorama System

In recent years,virtual reality tech has become very popular.As one of the way to get in virtual reality,panorama video has become the most popular application of virtual reality.The image mosaic tech is the base of panorama video,so ti is meaningful to study the image mosaic technology.The main works of this paper will be described as follows:(1)We correct fisheye image by this way.First,projecting fisheye image onto a spherical surface according the projection model of fisheye lens,then map the spherical surface to a planar surface according to longitude and latitude of the spherical surface.(2)We introduced a image registration method based on 3D spherical motion model.First,we match keypoints on the overlap region by SIFT.Then we project the matched keypoints to spherical surface.Calculating the parameter of the motion mode by using RANSAC.According to the parameter remapping the corrected image.Finally,we get the registered image.(3)To reduce the ghosting and exposure difference on blended image,we use sample point method to balance the exposure difference.Then remap the overlap region by calculating the optical flow of two image,and blend the image by linear blend method.The method behave good to reduce ghosting and exposure difference.