Trình bày một số kỹ thuật viễn thám cơ bản trong quá trình phân tích ảnh viễn thám nhằm nâng cao chất lượng giai đoạn ảnh viễn thám | Some Pre-Analysis Techniques of Remote Sensing Images for Land-Use in Mekong Delta Tong Phuoc Hoang Son and Phan Minh Thu Department of Marine Physics Institute of Oceanography 01 Cau Da Nha Trang Khanh Hoa Vietnam Tel 84 58 590 208 Fax 84 58 590 034 E-mail gishaiduong@ Department of Marine Environment and Ecology Institute of Oceanography 01 Cau Da Nha Trang Khanh Hoa Vietnam Tel 84 58 590 392 Fax 84 58 590 034 E-mail phanthu@ Abstract In recent year socio-economic development has changed land-use status strongly in Mekong Delta. This will affect making decision of regional and local developing plans. Therefore studying on fact identifying methods of land use status will be helpful for managers to make developing plans. The techniques of remote sensing analysis can make them. The remote sensing images can recognized the status of landuse rather well. However analysis results are influenced natural conditions during getting images time such as clouds covered and low resolution. However as the same time many satellites can give other images in the same as areas. Therefore the combining good signal areas of other images with the main images will give the better images. This processing is carried out by the fusion image method. In this paper this method is applied to merge the SPOT images main images with RADARSAT images using good signal areas . On the other ways other preprocessing techniques such as the filter methods can enhance the images and overcome these obstacles and difficulties. In addition the paper also gives some results of application image analysis for landuse identification. Auto-detection of shrimp ponds presents the first general pictures of distribution of shrimp ponds in study areas which is very helpful for making plans of field trips of the next analysis processes. The supervised classification method cooperation with field trips and ground truth helps in recognizing landuse status automatically. 1. Introduction The Mekong .
