A multitemporal remote sensing image registration algorithm based on limitation of the gray change scope about feature points and their neighbor between two temporal images is developed in this dissertation . in the algorithm , the accuracy and robust of registration can be improved by robust parameter estimation and hierarchical structure 论文根据不同图像中对应特征点及其邻域灰度变化的限制条件,提出了一种多时相遥感图像配准算法,通过稳健性参数估计和分层处理,提高了图像配准的可靠性和精度。
The steps of this change detection method are : registering the multi - date image pairs , modeling the specific targets , detecting the specific targets , determining the positions of the specific targets , comparing the positions of the specific targets in the reference image and the detecting image respectively , reporting the change information 该变化检测法的工作流程为：多时相图像配准、特定类目标建模、检测特定类目标、确定特定类目标的位置、比较特定类目标在参考图像和检测图像中的位置、报告变化情况。
It is useful for processing a large amount of modis data . for the modis application of land cover , using 1km and 500m modis ib data of year 2001 from nsmc , 16 _ day and 32 _ day ndvi product was obtained through mvc . the result shows that mvc can apparently eliminate the effects of cloud contamination and obtain relatively pure land pixels 针对modis资料的陆表应用，利用国家卫星气象中心现有的2001年modis1公里和500米分辨率的资料，采用ndvi多时相最大值合成法( mvc ) ，生成了一年的16天合成的ndvi数据集产品，又进一步生成了32天合成产品，证明mvc法可有效消除陆表上空云污染的影响，获取相对稳定的陆表信息。
The change detection based on the clustering of the imagery is proposed to achieve change detection of the large area targets . the steps of this change detection method are : registering the multi - date image pairs , clustering the image pairs respectively , finding differences of the clustered - image pair , marking the differences using the striking colors in the copies of the image pair 对于检测大面积目标的变化，本文使用基于图像聚类的变化检测方法，实现步骤为：多时相图像配准、分别聚类参考图像和检测图像、寻找参考图像和检测图像聚类结果中具有类别差异的像素、在原始图像的副本中用醒目颜色标注变化部分。
Land cover of china region was analyzed using the 1km ndvi and the relative ancillary data . the result shows that the distribution of vegetation in china is correlative with space and the ndvi seasonal variations are different between various ecosystems . the land cover classification can be based on this character 利用中国区域1公里分辨率的多时相ndvi合成数据集及相关的辅助地理信息数据，对中国区域的陆表植被覆盖做了一般性分析，结果表明植被覆盖分布具有相当明显的地域性，并且各种类型陆表的ndvi表现出不同的季节性变化特征，可以此作为分类的依据；利用bayes最大似然分类法对我国东北地区进行了地表覆盖分类。
Obtaining full and accurate information on the spot , basing on the fractal theory , fully using remote sensing image as the main research data and relative thematic map as reference data , aiding of pci which is a powerful image processing software of remote sensing technique , the land desertification and the change of transitional belt between oasis and desert in yutian county are analyzed quantificationally . the rational proposals are tabled for the desert controlling and area rebuilding in the future , furthermore , this paper deeply discusses and validates the effect of fractal approach applied in the desertification research 在实地考察研究区获得翔实资料的基础上，以分形为理论依据，充分利用多时相卫星遥感数字图像为主要资料源，参考相关资料，借助遥感图像处理分析软件pci操作平台，定量分析评价于田县的沙漠化状况及绿洲?荒漠交错带的演变趋势，为今后沙漠化的控制、改造工作提出合理化建议，并对分形理论在绿洲?荒漠交错带定量研究中的作用作深入地探讨和验证。
2 ) radar incidence angle and surface roughness correction : to make radar incidence correction and eliminate the surface roughness effects , a wide range of surface parameters ( soil moisture , surface rms height , correlation length , incidence angle ) was input to the ibm model to simulate the effect of surface roughness and radar incidence angle on the sensitivity of soil moisture to the radar backscattering coefficient . a simple model was established to simulate the effects of incidence angle and surface roughness . 3 ) establishment of soil moisture change inversion model : according to a modified ibm model simulation results , the bare surface backscattering coefficients can be expressed as a funtion of the dielectric component for a given surface roughness when the surface slope greater than 2 . 0 , which is valid for most nature surface : in above equation , r0 is the surface reflectivity at normal incidence 本研究中，首先利用基于微波辐射传输方程的微波植被模型和积分方程( iem )模型模拟了各种地表土壤水分含量情况下，植被覆盖、地表粗糙度(包括地表均方根高度和相关长度) 、雷达入射角对c波段(频率4 . 7ghz )水平极化( hh )雷达后向散射系数的影响，在此基础上，建立模型消除了植被覆盖、地表粗糙度、及雷达入射角对雷达后向散射的影响，利用多时相50m分辨率radarsatscansar雷达后向散射系数图像反演得到了地表土壤水分变化模式信息。
On the basis of remote sensing technique ' s good characteristic with large - area , multi - time , multi - photograph variety , manifold abundant spectral information and high ground resolution , the fault tectonics frame , river geomorphy ( such as terrace , floodplain , shoal , etc ) and suspended load , etc . were explained after analyzed the fault tectonics , river geomorphy , characteristic in the tm image by gray bar statistics , primary component analyses , tm741 image integration , line convolve enhancement and model recognition etc . especially 9 piece of fault tectonics were explained in this thesis , in succession , the impacts of the factors severally were analyzed 遥感技术具有大范围、多时相、多片种、多层次、含有丰富的光谱信息及具有较高的地面分辨率的特点。本文利用该技术，运用灰阶统计特征分析和主成分分析、 tm741多波段融合、线性卷积增强、模型提取等一系列遥感解译分析方法，分析了断裂构造、河流地貌(阶地、漫滩、沙洲)及悬浮物等在tm遥感图象上的影像特征，解译出了安徽南部断裂构造格架、河流地貌和悬浮物的分布，并新解译出了9条近东西向的断裂。
A lot of data of elevation in different places of the shallow water of n antong were obtained by fish - exploring machine and gps determining and tide cor recting . an image which reflects landforms of nantong was obtained by selecting f rom the many noaa images on different channels and in different phases . based on the image , grey scales corresponding to different places were obtained . by using c la ssifying liner regression technique , liner regression equations were established between the elevation and grey scale , and the threshold values of grey scales of the different elevations were determined . according to the threshold values , the a reas of the tidal zone above different elevations of the shallow water of nanton g were estimated 通过利用gps及渔探器实测，并进行潮位订正，获得南通浅海海域大量测点的高程资料；通过对多时相各通道noaa卫星照片进行筛选，挑选能反映浅海地貌的通道资料，从中读取各测点相对应的灰度值，在此基础上利用分级线性回归，建立不同高程范围内的高程、灰度线性回归方程，确定不同高程的灰度阈值，从而测量出南通市浅海海域不同高程以上的潮间带面积、分布。
During the study , remote sensing information of multiband and multiseasonal as well as multiplatform is applied . at the same time , taking advantage of the gps positioning and spatial analyzing function of gis , analytical hierarchy process ( ahp ) is built to quantitatively analyze the landscape pattern in the middle reaches of hetian river 在研究中应用多时相（ 1959 、 2000 ） 、多波段、多平台的遥感信息，借助于gps定位、 gis的空间分析和模型分析功能，以及选用层次分析法，对和田河中游地区景观格局进行了定量化研究
