再提取

In the algorithm of target pick-up, firstly, the disturbance is closed off by band block filter. Then, the star aim is distinguished from the background by automation threshold segmentation.

在目标提取算法中，先采用带阻滤波隔离干扰，再采用自动阈值分割区分星点目标与背景，通过聚类分析剔除虚假目标干扰后，采用质心算法计算星点目标的质心坐标。

Three TM/ETM+ image (1999, 2002, 2007) were used. Land use change areas were determined by using two change detection techniques of post-classification comparison and spectrum comparison. The resultant change images obtained by the two change detection methods were overlaid to obtain more accurate change information.

本研究选取了1999年、2002年与2007年3期的TM/ETM+遥感图像，采用分类后比较法对沽源县1999~2007年的土地利用变化进行信息提取，再通过两者的叠加分析，获得了较为理想的变化监测结果。

That means to calculate the Hessian matrix of optical flow equation, and the weight of Lucas-Kanade＇s method is defined as the reciprocal of the conditioning number of its Hessian matrix.

然后借用灰度直方图的概念构造方向直方图，提取光流特征，方向直方图由量化光流场来得到，再利用方向直方图构造出一个模板库及其索引序列库。

Firstly,the new images' orientation parameters are resolved using the old aerial images with POS data in the same area,and feature points are extracted in old images,and new images' conjugate points are computed using forward intersection and collinearity equations.

首先利用带POS数据的老影像解求新影像的外方位元素，然后在老立体影像上提取特征点，根据前方交会和共线条件方程得到新影像上同名点的近似位置，再与新影像进行匹配，寻找匹配不好的点作为变化区域的初始位置。

But the ODOG based on the vision selective attention mechanism can effectively collect the interesting information and then segment the image by the coupled oscillation of the PCNN.

而基于视觉选择注意机制的方向性高斯差算子通过模拟生物视觉感受野的特点，在有效提取感兴趣区域的信息后，再通过脉冲耦合神经网络模型的自适应振荡，可达到图像分割的目的。

Where decomposability was concerned with the derivation of subsystems from overall systems, composability addresses the reverse process: extracting existing software elements from the context for which they were originally designed, so as to use them again in different contexts.

这里，分解性关注于把整个系统分解成子系统，而组合性从事相反的过程：从原始设计的环境中提取出现存的软件元素，使得在不同的环境中再一次使用它们。

In general, there is lots of geographic information on it. Point symbols, linear symbols, area symbols and texts counterchange on topographic map. Description of Relations among graphs is very difficult. Besides, there is defectiveness in scanning and deformation of map.

从总体上看，地形图承载了大量的地理信息，各种点状符号、线状符号、面状符号、文字注记在空间上纵横交错、相互叠置，反映在地形图上的是图形目标间的关系难以描述，再加扫描技术的不完善等因素，这给图象的分割和要素的识别以及拓扑信息的提取带来了很大的困难。

First, we smooth the tongue picture. We detect the tongue edge by wavelets and a method of which is based on color information differentiability.

首先，我们对舌象进行平滑去噪，再利用小波和基于彩色信息区分度的彩色边缘检测方法提取舌象边缘，获得舌面区域。

The so called indirect integral operation means that Eular angles can be gotten from the direction cosine matrix which is received by the integral operation of quaternions or direction cosine.

飞行器导航中，姿态角的获取可以通过直接或间接的积分运算求得的，所谓间接获取即是指通过四元数或方向余弦的积分运算求得姿态矩阵，再从姿态矩阵中提取姿态角。

According to the feature of the SARS Chest Radiographic Images, the wavelet analysis method is put forward to dispose the SARS images and the wavelet coefficients are picked up. After the wavelet threshold noise reducing and the wavelet threshold enhancing disposure to the each of the wavelet coefficients, the clear images are reconstructed at last.

摘 要：通过对非典型肺炎的胸部 X 线图像的特征分析，提出采用小波分析方法，对图像做小波变换，提取各层小波分解系数，利用阈值法对各系数作去噪预处理，然后再利用阈值法对各系数做衰减或增强处理，最后重构出清晰图像。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。