Abstract:

In order to achieve remote sensing digital image fast displaying, by a case study in ERDAS IMAGINE IMG standard data format image file, we gave environment configuration process, development frameworks, established processes and realization of functional modules of the program of IMG image display and coordinated real-time display under the Windows system. The program realizes displaying IMG and real-time coordinate by use of the open source GDAL(Geospatial Data Abstraction Librarylibrary), a graphical user interface framework QT as a development tool, and Visual Studio 2008 as the development platform. The results show that Multi-threaded sub-block processing technology shortens 2. 7 s for 1. 8 GByte remote sensing image compared to the use of pure RasterIO (), improves the efficiency of image reading and display picture and meets the large amount of data applications.

Key words: remote sensing digital image, geospatial data abstraction library(GDAL) library, QT frame, IMG formate, fast display program