Research On 3D Reconstruction Method Based On Fisheye Image

With the development of technology,fisheye cameras have gradually come into people's mind.With the advantages of larger imaging and higher shooting efficiency,fisheye lenses have developed rapidly in recent years and have good prospects in many fields.However,fisheye cameras are still at an early stage in many ways.A lot of technologies are not mature enough and need to be improved.Using fisheye cameras for 3D reconstruction will be faster than ordinary cameras,but it also faces other difficulties.The three-dimensional reconstruction of the fisheye lens is mainly to overcome the difficulty that the imaging method of the fisheye lens is different from the ordinary lens and the imaging distortion is greatly changed.This paper mainly proposes improvements for the fisheye lens calibration algorithm,and provides some feasible solutions for the three-dimensional reconstruction of the fisheye camera.First of all,by studying calibration technology of fisheye camera,it shows that undue fisheye camera distortion and the accuracy of its correction could be crucial factors for the results.The calibration of the fisheye camera is the most critical technology for studying fisheye lenses.The angle of view of the fisheye image is very large.If it is stored on the plan,it will lose a lot of effective imaging.The current way for latitude and longitude mapping correction is to present fisheye image on a latitude and longitude map.This method can save all effective pixels,but the result is poor in accuracy.Therefore,for the method of latitude and longitude mapping correction,the calibration of the fisheye camera is improved,so that the image can not only save the effective image,but also have better accuracy,and maximize the two-dimensional restoration of the captured scene.Secondly,in order to study the method of calculating the relative position of the lens of the fisheye panoramic camera and find the fixed relative position between the lenses,we can prepare for the subsequent three-dimensional reconstruction.This article introduces two different methods to figure out the external reference.Different method can be chosen for different stuations.Afterwards,the matching algorithm between the images with the overlapping areas of the lens is studied,which can match larger areas and achieve reliability in efficiency and accuracy.Finally,the three-dimensional reconstruction of the fisheye image corrected by the improved latitude and longitude mapping is performed.Due to the different image storage methods,the three-dimensional reconstruction cannot take the traditional method.The obtained relative position of the camera in three-dimensional space and the matching result in the two-dimensional image can be helpgul to the actual three-dimensional space position of the object on the latitude and longitude map so that we can find the three-dimensional space coordinates and display it visually.