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Based on projective geometry,the research works about 3D invariances extraction and application have been done in this thesis as following:(1) The basic theories and concepts in projective geometry are systematically summarized. It includes:the camera models of perspective imaging,projective collineation,cross ratio,a simple compare about invariance among some geometry transformations,fundamental matrix,epipolar and epipolar line in epipolar geometry,and so on.

基于射影几何理论，论文围绕3D不变特征的提取和应用进行了如下的研究工作：(1)系统总结了射影几何中的若干基础概念，包括：透视成像的相机模型、射影对应、交比不变量、基于不同几何变换下的不变量的简单对比、对极几何中的基础矩阵、对极点、对极线等。

Gibbons is both a classical and regional photographer, an aspect that is note unusual as the wet collodion process requires one to carry the processing equipment into the field. It is also large:14×11 inches-the size of the camera.

Gibbons 是专业的古典摄影师，一方面关注的领域是可以达到湿版火棉胶摄影法需求的设备，同时也对：14×11英尺的相机很感兴趣。

Another way to achieve correct color balance, if your camera supports it, is to save your photos in raw format.

要获得正确的色彩平衡，如果相机支持的话，可以将照片储存为RAW格式。

Experimental results show that octree color quantization and vector median filter can perform well in preprocessing of color image for digital camera.

结果表明，用八叉树结构量化和矢量中值滤波对数码相机采集到的彩色图像进行预处理可达到较理想的效果。

Using the color changing information of phase change paint, this technique mainly applies an image capturing and processing system which consists of a CCD video camera and a computer to measure the characteristic parameter and the heat transfer rate of model surface in hypersonic flow.

该技术主要是运用CCD摄像机与计算机组成的图像采集与处理系统，利用涂料发生相变的颜色变化信息，测定高超声速流场中模型表面气动加热的特性参数和热流分布情况。

undertakes with digital camera photography of color separation polarized light is effective, relatively traditional method improved work efficiency.

结论用数码相机进行分色偏振光摄影是有效的，相对传统方法提高了工作效率。

The purpose considers to use the possibility that digital camera has color separation polarized light photographs and method.

目的研究运用数码相机进行分色偏振光摄影的可能性和方法。

His wife egged him on to buy a color television camera .

他的妻子怂恿他买部彩色电视摄像机。

An optional remote camera controller is available for controlling DVRs and the company's combination dome cameras.

一个可选远程摄像控制器能控制多个DVR和公司的一体化球机。

The camera just come apart the first time he used it.

这相机在他第一次使用时就破了。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。