GDAL-based Remote Sensing Image Change Detection Control Viewing Tool Developed

With the continuous development of remote sensing technology,the resolution of remote sensing images is getting higher and higher,and the amount of data is increasing.Generally,a high-scoring TIFF format remote sensing image can reach 2-3G.Reading these data consumes a lot of memory resources and the reading speed is slow.Especially in a specific scenario(such as change detection),it is necessary to check and verify more than two different images,which places higher requirements on the computer.At present,although mainstream software such as ENVI has complete functions,the computer performance requirements are high,the purchase cost is expensive,and when multiple highresolution images are opened at the same time,the speed is slow,and even occasional freezes and crashes,its reading and browsing efficiency is still has a lot of room for improvement.Therefore,research on the fast reading and display method of large-scale high-resolution images,and the development of auxiliary software tools for viewing and comparing two or more remote sensing images according to actual work needs,is important for improving the efficiency of remote sensing image comparison processing.In this research,I develop a fast,lightweight,and expandable remote sensing image viewing software tools to provide users with the functions of quickly reading,browsing and comparing images to ensure the simplicity and fluency of the software to improve work efficiency.The main results of this research include the following three points.(1)Use the GDAL library to develop a lightweight TIFF remote sensing image viewing software tool to provide stable and fast remote sensing reading and viewing functions.(2)Combine the Qt interface design method,Use the Qt signal and slot mechanism to design the user interface of the software,and further realize the functions of image zooming,roaming browsing,geographic coordinate information query and rapid comparison between images.(3)Designing software test modules and preparing Test data,I write software test code,and perform functional test and efficiency test on software functions.The test results show that the functions of the software are normal,and the software runs stably and performs well.