Study On The Mosaic Technique Of Multi-source Remote Sensing Satellite Images

The purpose of mosaic is to integrate multiple images through certain technical means to provide data support for subsequent remote sensing applications.This paper takes GF1,GF2,BJ2 and ZY3 as examples to carry out the application research of multi-source remote sensing satellite image mosaic technology.Firstly,pre-processing work such as block adjustment and geometric correction is performed on the experimental image,and the correction accuracy is checked and the full-color and multi-spectral images are merged.The re-sampling and uniform-smoothing algorithms are analyzed and compared and the optimal algorithm is derived.The mosaic network was automatically generated based on the morphological minimum distance transformation principle,and the uniform color template was developed.The imaging experiment was carried out in Chongqing as the experimental area to verify the accuracy and effectiveness of the experimental methods and conclusions.The specific work completed in this paper is as follows:(1)Closely surrounding the field of mosaic technology,summarize and analyze the research status at home and abroad,and combine the author's participation in the project content,and clarify the focus of this paper,that is,research and discuss multisource remote sensing satellite image mosaic technology to improve mosaic The overall quality of the image.(2)The main technical methods in the image mosaic process,including orthorectification correction and fusion,are introduced.The algorithms are studied and compared in detail in the aspects of image resampling and uniformity.(3)An intelligent automatic inlay line generation technique is proposed.Based on the principle of morphological minimum distance transformation,the mosaic line raster image between overlapping orthoimages is calculated and formed into a grid topological polygon,and then the grid topology polygon is vectorized.Automatically form a mosaic topology network to achieve automatic production of Mosaic line.(4)Combining with the actual characteristics of the experimental area,a set of targeted image mosaic schemes was developed and experiments were carried out.The subjective visual qualitative analysis of the final image mosaic results and the objective quantitative indicators of accuracy evaluation were used in the evaluation papers.The mosaic technology method completely realizes the mosaic task of multisource image,and the detailed texture of the mosaic image is clear and the color is full.