Temporal And Spatial Information To Assist In The Bamboo Thematic Information Extraction Based On HJ-1 Multi-spectral Image

Mastering and utilizing the factor influencing the extraction of bamboo thematic information.has important significance on bamboo resources investigation and monitoring.Yongan city of Fujian Province as the study area,using four HJ-1 multi-spectral remote sensing image,to determine the best phase of bamboo thematic information extraction,analysis of the impact of terrain factors on bamboo changes in spectral features and texture features assist bamboo thematic information extraction,determining the best combination of texture features,Then based on the optimal phase,through,bamboo thematic information for texture assisted.Based on optimal phase,the spectral sheet of bamboo thematic information extracted from terrain factors,and the texture of the thematic information of bamboo,bamboo method is proposed to extract thematic informnation based on spatio-temporal information aided,we get the following conclusions:(1)The spatial resolution of HJ-1 multi-spectral remote sensing image data for 30m,revisiting period for 2d,SPOT,TM remote sensing images without high temporal resolution,and at the same time MODIS remote sensing images without high spatial resolution,these advantages of HJ-1 multi-spectral remote sensing image,can meet the space resolution distribution investigation and monitoring of bamboo resource requirements,and can provide a large amount of multitemporal remote sensing image as the research at different phase of bamboo based spectrum feature differences,is a good source of data extracting thematic information of bamboo.(2)The thematic information extraction of bamboo best phase selection is the key link of thematic information extraction of bamboo,In this study,in March 14,2009,May 9,2009,October 29,2009 and December 21,2009 four HJ-1 multi spectral images as the basic data source,spectral analysis of the spectral characteristics of separability study through the analysis of diffcrent temporal remote sensing images and the different phase of remote sensing image,supplermented by bamboo thematic information classificalion results2 evaluate the accuracy,confirm each other,to determine the extraction bamboo thematic information best phase for the spring.(3)Terrain factor plays a very important role in the mountainous and hilly complex bamboo thematic information extraction of terrain environment.different terrain conditions,bamboo has a different spectral reflectance,studies show that effects of slope and altitude on the spectral reflectance of large bamboo,slope less affected,according to the topography factor influence on spectral reflectance characteristics of bamboo,were extracted slice processing of bamboo thematic information of remote sensing images,the total extraction accuracy reached 72.5%,7 percentage points higher than rely directly on spectral classification accuracy.(4)Texture feature is a kind of important information in remote sensing image,by calculating the texture analysis and OIF index in different terrain conditions typical tree species,determining the best combinations texture feature recognition bamboo thematic information for mean,variance,contrast,thematic information extraction of bamboo texture feature combination based on graph,extracted accuracy of 70.5%.5 percentage points higher than rely directly on spectral classification accuracy,suggested that the texture features are bamboo thematic information extraction can also achieve satisfactory results,indicating the important role in extracting thematic information of texture feature of Phyllostachys pubescens(5)Through the research discovery,extraction of thematic information is the best choice of bamboo,and topographic factors and texture features can improve the accuracy of extraction of thematic information of bamboo,the "best phase+spectral slice segmentation based on terrain+texture feature information extraction" method for extracting bamboo thematic information based on spatial and temporal information,firstly,put forward thematic information extraction method of bamboo spatio-temporal information based on terrain factors,divided by a bamboo spectrum film classification map bamboo thematic information obtained by the terrain factors,using the best combination of bamboo texture map to extract the bamboo thematic information,the total extraction accuracy reached 79.5%,so as to obtain the best bamboo thematic information extraction method.