Research On Auto Mosaic And Fast Positioning Based On Digital Images Of Low-Altitude UAV Remote Sensing

Currently, low altitude remote sensing with unmanned aerial vehicles (UAV) plays a more and more important role in many realms. In this article, we researched in the auto mosaic and fast positioning techniques of low altitude remote sensing digital images by using the remote sensing data from the fixed-wing unmanned aerial vehicle platform, focused on the discussion of full-automatic digital images mosaic on the basis of SFM (Structure From Motion) and the fast aerial triangulation which combines low altitude remote sensing digital images with mobile road survey. Our mainly work and achievement are as follows:1. Described the background and significance of this article and also the research status between domestic and aboard in the obtaining and processing of unmanned aerial vehicle remote sensing data.2. Introduced four types of common used interest points operators and two types of local invariant feature extraction methods .Based on three evaluate criteria in the aim of practical need of application and the characteristic of the low altitude unmanned aerial vehicle remote sensing: detection speed,adaptability,extraction efficiency, testified the application performance in the low altitude remote sensing images of these operators and local invariant features.3. Researched on the methods of texture enhancement pre-processing and wavelet denoising for low altitude remote sensing digital images and the influence of it for feature point extraction and matching. Proposed a full-automatic method to generate orthoimage and mosaic from low altitude remote sensing digital images on the basis of SFM. Experiment proved the method has automatic process and the effect of mosaic is well.4. Researched on the fast positioning method and working process by combining unmanned aerial vehicle low altitude remote sensing system with mobile road surveying system which shortened the period of photogrammetric work and improved efficiency.5. A brief introduction of the process of using low-altitude UAV remote sensing image data. Developed a data processing systems specialized in low-altitude UAV remote sensing.