1) the mixed-pixel principle
混合像元成像原理
1.
The quantitative analysis method of errors is used based on the mixed-pixel principle,the process of error forming and the probability distribution of errors.
本文从遥感混合像元成像原理及随机误差的概率分布规律等方面定量分析了SPOT-5遥感数据的误差大小。
2) mixed pixel
混合像元
1.
Mixed pixel and mixed pixel analysis.;
混合像元及混合像元分析
2.
The Study of the Partition of High Spectrum Mixed Pixel and the Topographical Objects Classification;
高光谱混合像元的分解及地物分类的研究
3.
Blind signal separation (BSS) based on the technique of independent component analysis (ICA) was introduced to the quantitative remote sensing field for mixed pixel unmixing.
将基于独立成分分析(independent component analysis,ICA)技术的盲分解方法(blind signal separation,BSS)应用于遥感混合像元的定量分解,解决了幅度不确定性问题,实现了从高光谱数据中同时得到定量的组分光谱信息和组分权重信息。
3) Mixed-pixel
混合像元
1.
The remotely sensed image often has many mixed-pixels,which is one of the important reasons for low interpretation accuracy.
遥感成像中混合像元的产生是不可避免的,它的存在严重影响了遥感影像的解译精度,是传统的像元级遥感分类和面积量测精度难以达到实用要求的主要原因。
2.
Surface parameters (namely, fractional vegetation and soil moisture)are estimated using ERS Wind Scatterometer data based on a mixed-pixel model.
基于混合像元的方法,利用ERS风散射计(WSC)数据估算植被覆盖率和同时期NDVI有较高的相关性(0。
4) mixture pixel
混合像元
1.
This paper studied on spectral feature abstraction and selection for mixture pixel decomposition according to the attributes of linear mixture model,and proposed to use discrete spectral wavelet feature of approximated coefficients for abundance estimation.
根据线性混合模型的特点,探讨面向混合像元分解的光谱特征提取与选择,提出以小波低频系数为特征的混合像元分解方法。
2.
To solve the problems of mixture pixel classification in the RS image,this paper main introduction is fuzzy classified thought and the fuzzy classification model of remote sensing images mix pixel,to research for classification of fuzzy model good and bad points as well as it is suitable the condition.
为了解决遥感影像中混合像元的分类问题,主要介绍遥感影像混合像元的模糊分类思想和模糊分类模型,研究模糊模型的分类优缺点以及其适用条件。
5) Mixed pixels
混合像元
1.
Aim Starting with purification of mixed pixels,to study the more higher classification precision technique,which is used to reduce the uncertainty and low precision of classification as a result of mixed pixels widely contained in the remote sensing image because of the complexity of the spectrum taken from the field and the limit spatial resolution of the sensor.
目的以混合像元提纯为突破口,研究遥感影像高分类精度的方法,以减少由于地物波谱的复杂性、传感器空间分辨率的局限性导致混合像元普遍存在而引起的影像信息不确定性和分类精度低指标性。
2.
There are lots of mixed pixels in the low spatial resolution remote sensing images due to the limitation of the resolution of the satelite sensor.
由于传感器的分辨率的限制,在低空间分辨率遥感图像中存在着大量的混合像元。
3.
In order to improve the precision of remote sensing application,resolving the problem of unmixing the mixed pixels should be done.
混合像元是遥感领域研究的热点,也是难点。
6) imaging principle
成像原理
1.
Research on imaging principles of a silver superlens;
银膜超级透镜成像原理研究
2.
Numerical study the imaging principle of photon scanning tunneling microscope;
光子扫描隧道显微镜成像原理的数值研究
3.
This article describes briefly the imaging principle,imaging technology,as well as the relevant technology and advantages and disadvantages of MTCP.
本文简单介绍磁共振胰胆管造影的成像原理、成像技术、相关技术及其优缺点。
补充资料:阿贝成像原理
透镜组在相干照明下的分辨原理。是1873年由E.阿贝在显微镜成像中提出来的。在相干照明下,被物体衍射的相干光(见光的干涉),只有当它被显微镜物镜收集时,才能对成像有贡献。换句话说,像平面上光场分布和像的分辨率由物镜收集多少衍射光来决定。最简单情况是考虑一个振幅透过率周期变化的物体──光栅。讨论光栅在相干平面波照明下的成像问题。相干平面波被光栅衍射后,各衍射级次平面波有各自传播方向,在物镜后焦面上产生光栅的夫琅和费衍射图样,即物镜起了变换透镜作用,后焦面就是频谱面。如图所示,...S-1,S0,S+1...表示衍射图样的各个极大值的位置。根据惠更斯-菲涅耳原理,在焦面上的这些衍射图样可以看成许多相干次波源,每个次波源的强度正比于该点的振幅。因此在像平面 ??i上成像过程可以看成从这些次波源发出的光波互相干涉的结果,即所谓成像的两次衍射过程。要得到一个逼真的像,所有衍射光都必须参与成像过程,事实上由于物镜的孔径有限,高衍射级次光波(相当于物的高空间频率分量)不能被收集进物镜,因而在物镜后焦面上的空间频谱中也缺少了高频分量,这些损失了的高频分量会使像的细节失真。以光栅为例,零级衍射沿光轴传播,其他衍射级次在零级两侧以各自方向传播,假若物镜只收集零级衍射波,则像平面是均匀照明,原光栅物体的周期结构消失;假若收集了零级和两个正负一级衍射光波,这时像有与物相同的周期结构,但强度分布被拉平;假若只收集正负二级衍射光波,这时像的细节有很大失真,出现完全虚假的二倍周期结构的像。
参考书目
M.玻恩、E.沃耳夫著,杨葭荪等译:《光学原理》,上册,科学出版社,北京,1978。(M.Born and E. Wolf,Principles of Optics, 5th ed., Pergamon Press,Oxford, 1975.)
参考书目
M.玻恩、E.沃耳夫著,杨葭荪等译:《光学原理》,上册,科学出版社,北京,1978。(M.Born and E. Wolf,Principles of Optics, 5th ed., Pergamon Press,Oxford, 1975.)
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参考词条