Micro-UAV Photogrammetry Data Processing Research

The emergence of the uav photogrammetry to make up for the traditional photogrammetry and remote sensing in a timely manner, fine geospatial data acquisition. uav photogrammetry with its flexibility, low cost, little affected by the climate characteristic, has been widely used in many fields, but uav images has great attitude angle, small picture format, large quantity, high overlapp rate, high resolution. Images of attitude angle is big, small picture format lead to the difficulty of data processing. Image of high overlap rate, high resolution for true ortho provides a good data sources. As one of the uav photogrammetry, the micro-uav photogrammetry both advantages and disadvantages of the uav photogrammetry, but micro-uav images compared to large and medium-sized uav images attitude angle is larger, picture format is smaller, the number of image is more.This article mainly studied according to the characteristics of micro-uav image aerial triangulation method based on multiple view geometry and the use of micro-uav image process of true ortho.(1) To fully understand the characteristics of micro-uav photogrammetry system, the micro-uav photogrammetry system are studied in detail the composition and working process. Analysis of micro uav image characteristics, pointed out that the influence of each characteristic of data processing.(2) Study on relevant theories of multiple view geometry, illustrates the multiple view geometry in the image on the attitude angle of relative orientation process.(3) Multiple view geometry in the derived camera matrix nonhomogeneous expression form, and compared with collinear equation of photogrammetry, illustrate nonhomogeneous coordinates said camera the consistency of the matrix and the line equation and multiple view geometry combined with photogrammetric adjustment methods to lay the foundation.(4) Test the scheme of setting out control point in aerial triangulation under the background of multiple view geometry.Explore suitable for the scheme of set out control point for aerial triangulation calculating based on multiple view geometry layout scheme, for the practice of using micro-uav photogrammetry to provide the reference.(5) Studied the process of production true ortho from micro-uav image, pointed out that the key step in the true ortho process.According to the standards of surveying and mapping completed the true ortho plane position accuracy verification.