航摄胶片影像质量比较方法研究

航空摄影影像质量的优劣直接影响着后续的测绘生产,因此对影像质量的评定、比较十分重要。在航摄项目实施过程中,大多以作业员的经验进行定性的目视判断,这种方法受作业员的主观因素影像较大。本文结合青藏地区航摄胶片选型实验,尝试性地提出一套基于数字测试的评价比较方法,该方法对胶片数字化影像的多项指标进行定量或定性的测试比较,然后采用“玫瑰图”法进行综合比较。试验表明,该方法能有效、直观地体现影像在各个方面的差异,且具有简单实用、容易实现的优点。

The research of the method for comparing the photographs of different aero films

The quality of aero-photographs affects the follow-up surveying and mapping production directly.Therefore,evaluating the quality of aero-photographs is very important.In the course of implementing the photogrammetry project,the aero-photographs is evaluated by operators mostly with their experience,this method is much affected by the subjective factor.A new evaluation method put forward in this paper is based on digital test tentatively,which had been applied successfully in the selection of aero-films in Qinghai-Tibet region,2005.The process of the method is:testing some parameters of several digital images quantificationally or qualitatively firstly,then colligating those parameters by "Rose Map" which obtained from meteorology,and comparing the result finally.The application shows that the method can reflect differences in various aspects effectively and visually,and it is simple,practical,and achievable.