增加航空摄影地面收容宽度方法研究

Method of Improving Coverage Width of Aerial Camera

在实施大面积航空摄影时,常需要单航线飞行获取较大的地面收容宽度以提高效率,但单台航空相机的地面收容宽度是有限的。基于某项目的研制,为实现单航线摄影地面收容宽度不小于5.2 H(H为摄影高度)的指标,提出了采用多台短焦距相机组合使用的方式增加单航线摄影地面收容宽度。论述了采用双并列、三并列、四并列实现地面收容宽度指标的计算方法,通过计算前向像移速度差选择最优方案。该方法已在自然灾害监视及灾后重建普查方面得到广泛应用,文中论述的方法对推扫式航空相机、短焦距面阵CCD及胶片相机都是适用的。

When the large-scale aerial photography is implemented,it is often need to obtain bigger coverage width to improve efficiency by single flight course fly.But,the coverage width of single aerial camera is limited,for realizing the coverage width specification of not less than 5.2H（H is defined as photograph height）,based on some actual project,a method that the coverage width is improved by utilizing camera integration with short focal length is proposed.In this paper,some algorithms of twin-camera,tri-camera and four-camera for improving the coverage length are discussed.Furthermore,an optimum scheme is chosen by calculating the forward image motion velocity difference.This method has been widely used in the field of surveillance of naturaldisaster and re-establishment survey.Besides,the method is also feasible for scanning-aerial camera,short focal length plane array CCD camera and film camera.