尺度空间

即使当尺度空间常数n较小时本文提出的算子亦具有较理想的带通特性及高频抑制性能。

Even if the scale space constant n is smaller , the spectrum of LOB operator has better bandpass characteristics and high frequency attenuation performance .

最后针对SIFT提取过程中的不足，如尺度空间构造耗时、计算机复杂度较高等方面提出了一些改进。

Finally , the lack of SIFT extraction process , such as scale space construction took , computer complexity and higher made a number of improvements .

天津表土PAHs不同组分和土壤理化参数的多尺度空间关系

Multi-scale Spatial Relationship of PAHs Compounds and Soil Properties in Tianjin Area

天津地区表土PAHs含量的多尺度空间相关性

Multi-scale spatial characteristics of topsoil PAHs in Tianjin area

多尺度空间数据库集成和计算技术是GIS应用和服务需要解决的重要技术问题。

Multi-scale spatial database integration and calculation technology are the important techniques which need being solved in the course of GIS applications and services .

基于小波变换的NDVI与地形因子多尺度空间相关分析

Multi-scale spatial analysis on NDVI and topographical factors using wavelet transform

基于尺度空间理论的Harris角点检测

Harris corner detection based on theory of scale-space

然后，借鉴全变差（TV）图像恢复的思想将上述迭代正则化方法推广到一类基于平移不变小波变换的加权逆尺度空间。

In addition , by idea borrowing from total variation based image restoration , we generalize the iterative regularization methods to a new class of nonlinear inverse scale spaces with weight .

基于影像尺度空间表达与鲁棒Hausdorff距离的快速角点特征匹配方法

A Fast Image Matching Approach Based on Scale-space Representation of Image and a Novel Robust Hausdorff Distance

我们认为这可能与小尺度空间内spike辐射源区的等离子体密度出现短时标的波动及磁场强度的起伏有关。

We think it is related to the fluctuations of the plasma density and the magnetic field of the source region in a small space scale .

提出了一种新的基于GVFSnake模型的分割方法。包括二个要点：①在多尺度空间上计算梯度向量流。

The innovative achievements of the thesis include : 1 . A new segmentation method based on GVF snake is proposed .

在最粗的尺度空间里，我们根据视频流的概率分布特点，采用基于瑞利（Rayleigh）分布的AR模型对尺度系数建模；

In the coarsest scaling space , we use a rayleigh distribution based AR model to generate the scaling coefficients , for the scaling coefficients are approximately rayleigh distributed .

运用小波变换（WT）对老年痴呆（AD）患者与正常老人在安静闭眼时的脑电（EEG）数据进行了多尺度空间能量分布特征提取。

Wavelet transform ( WT ) technique was applied to EEG of Alzheimer 's Disease ( AD ) patients and health adult to extract the features of multi-scale space energy distribution .

用CB形态滤波器对灰度图进行滤波，构成CB形态学尺度空间，以实现对拐角的多尺度检测。

Filtering the intensity image by CB morphological filters , the idea of CB morphological scale space is constructed , by which to realize multi scale corner detection .

SIFT算法是一种基于尺度空间的，对图像缩放、旋转甚至仿射变换依然保持不变性的特征匹配算法。

SIFT is a feature matching algorithm based on the scale space , which can keep invariant in the image transformation of scale , rotation and affine distortion .

在影响稻田CH4排放大尺度空间变异性的主要因素中，土壤水分历史可能比土壤性质更为重要。

Soil water history might be a more important factor than soil property in controlling the spatial variability of CH 4 emissions from rice fields on large spatial scale .

SIFT算法主要包括建立尺度空间，空间极值点检测，确定特征点方向和生成特征描述符四个步骤。

SIFT algorithm mainly includes four steps such as establishment of scale space , detection of extreme space points , determination of feature points direction and generation of feature descriptor .

在第三部分图象恢复中，首先介绍了Tikhonov正则化、各向同性扩散与尺度空间等基本理论。

In the third section , some essential concepts and theories , such as Tikhonov regularization , anisotropic diffusion and scale space are first introduced .

从尺度空间的观点看，Canny边缘检测方法的多尺度形式等价于在一个线性高斯尺度空间中进行Canny最优算子的边缘检测。

From the scale space point of view , the multiscale version of the Canny edge detection is , in fact , the edge detection in a Gaussian scale space .

针对实用性增强现实技术的性能及功能需求，对FAST和SURF这两种常用算法进行了详细分析与研究，在此基础上提出了将非尺度空间检测算法FAST与尺度空间算法SURF相结合的策略。

For Mobile Augmented Reality performance and functional requirements , two commonly used algorithms FAST and SURF are analyzed in detail and research . On this basis , proposed the strategy of combining non-scale space detection algorithm FAST and scale space algorithm SURF .

运用计算流体力学（CFD）二维模型研究预混天然气在小尺度空间内燃烧及墙壁的导热系数、外部的热损对燃烧特性的影响。

A CFD ( computational fluid dynamics ) two-dimensional model was employed to study the combustion of premixed natural gas in a small-scale space and the impact of wall heat-conductivity factor and outer wall heat loss on the combustion characteristics .

研究了一种基于尺度空间理论的Harris角点检测方法。

An improved method of Harris corner based on the theory of scale-space was described , and a scale-space representation of Harris corner by which local maximum points were detected at each scale level was established .

最后我们使用QPTR信任域算法在尺度空间里和图像平面内快速搜索概率分布图的多尺度规范化Laplacian滤波函数极值，实现了目标定位并同时决定了其尺度，从而完成了跟踪任务。

We employ the QP_TR trust region algorithm to search the local maxima of multi-scale normalized Laplacian filter of the probability distribution image to locate the target as well as determine its scale .

针对多媒体图像形状检索，提出增强型曲率尺度空间（ECSS）描述子，构建了基于该描述子的形状检索模块IRS。

In order to retrieve multimedia image , we proposed Enhanced Curvature Scale Space ( ECSS ) and designed ECSS-based shape retrieval module IRS .

SIFT算法对图像进行配准时，要在尺度空间上提取大量的特征点并进行计算，在配准的过程中常常会出现误匹配，通常都是采用欧氏距离的方法来消除误匹配。

The SIFT algorithm to when carries on the image matching , must to extract the large scale space feature points and the calculated , so in the process of registration will appear the phenomenon of mismatch .

本文以2-D高斯函数作为核函数，明确给出了角点图像的尺度空间检测边缘是一个由角边界的斜率和分析尺度共同决定的椭圆。

With the 2-D Gaussian function as the kernel , the detected edge of an acute corner in scale-space , that is an ellipse determined by the slope of the corner boundary and the analysis scale , is given out clearly in this paper .

曲率尺度空间（CSS）技术是计算机视觉领域的一种现代化工具，因其一系列优秀性质而入选MPEG-7标准。

The curvature scale space ( CSS ) technique is considered as a modern tool in the field of computer vision . It has been selected as a key technique in the MPEG-7 standardization due to a number of nice properties .

而在众多土地利用变化模型中，CLUE-S模型比较适用于小尺度空间范围的区域土地利用变化研究。

It shows the CLUE-S Model is a considerable one which is suitable to the research on simulating small scale and typical region land use change among many models .

分析了小波包分解尺度空间系数v1不压缩和压缩2种方案，以及小波包完全分解和基于熵值的最优分解下各压缩指标随尺度的变化情况，并比较了不同小波的压缩效果。

The compression indices changed with decomposition orders are analyzed under the different methods that the coefficients of scale space ( v 1 ) can be compressed and not compressed , and the whole decomposition and optimal decomposition based on entropy .

利用图像Gabor分解的幅度谱，依据多尺度空间局部能量分布、Hurst分形指数、方向差别来计算纹理特征向量，最后采用自适应加权的街区距离作为相似性准则。

Texture image was decomposed based on Gabor transformation , the rotation-invariant vector was formed by making use of the amplitude spectrum and combining with energy distributions , Hurst parameters and direction differences . Finally , the adaptive weighted distance was used to measure the similarity .