摄像机镜头

Research on calibration of cameras based on cross ratio invariability ;2. Firstly,order radial lens distortion parameters are computed by using cross ratio invariability .

该方法利用透视投影的交比不变性原理标定镜头的畸变系数，基于摄像机成像的单应性矩阵及内部参数的基本约束，线性标定出其他摄像机参数。

To improve the imaging quality of CCD camera and make the lens small in size,compact in structure,the wide field of view optical lens with the standard quadric surface and even aspheric surface was designed.

为提高CCD摄像机的成像质量，同时使镜头结构紧凑、小型化，在大视场光学镜头的设计中，引入标准二次曲面和偶次非球面。

On Image-Collecting, trapezoidal distortion is one of the most common distortion. We present a rectification method for it. In the case of knowing the focal distance and the size of CCD, the only parameter needed to know to restore the image is the angle of the camera axis with the ground.

摘要图像采集中的梯形失真是工程中最常见的失真之一，对此本文提出一种校正方法，在已知摄像机的镜头焦距和CCD大小的情况下，仅需要知道摄像机中轴线与地面的倾角一个参数，不需要控制点，就可以恢复原始图像。

In this method we considerately consider the non-linear distortion of the scene and system error in the camera model, and introduce the non-linear distortion of the lens and system error into the direct-linear calibration algorithm, and quickly realize the camera calibration through a simple linear iterative method.

该方法在摄像机模型中全面考虑了镜头的非线性畸变和系统误差，在直接线性标定法中引入了处理镜头非线性畸变和系统误差的因子，通过简单的迭代求解实现了对摄像机的快速定标。

This article mainly introduction cliental software design of the network video supervisory system, which is divided into the whole several big modules in use of the object-oriented method: the manager registering module, camera picture controlling module, camera grouping and administration module, the camera saving and warning module, rapes with the lens controlling module.

本文主要介绍网络视频监控系统的客户端软件设计，采用面向对象的方法，将整体分为几大模块：管理员登录模块；摄像机画面控制模块；摄像机分组及管理模块；摄像机存储和报警提示模块；云台和镜头控制模块。

This article has first designed the hardware of the examination system, chose the appropriate hardware system according to the special production environment and the technics requirement of the Steaming stereotypia. Owing to production line work condition very severe, the temperature and pressure of the air is high, moreover included many corrosive chemical substance, the general industry camera was unable to work in this condition, so it must indirectly obtain a wiredrawing position image through the special lens, then transmitted to the CCD camera by the optical fiber. Transmit the image information to the PC system through the data-acquisition board. analysis the image information by the image-processing software, again send analysis result to the controller.

本文首先对检测系统进行了硬件设计，根据汽蒸定型的特殊生产环境和工艺要求选择了合适的硬件系统，由于生产线的作业条件非常恶劣，空气高温高压，而且含有许多腐蚀性的化学物质，一般的工业摄像机无法工作，只能通过特种镜头间接获得拉丝点位置的图像，然后通过光纤传送到CCD摄像机，拍摄到的图像信息通过图像采集卡传输到PC系统，由图像处理程序对图像信息进行分析，再给控制器输出分析结果。

The unit includes a removable infrared cut filter, digital signal processing circuitry with a 1/3-inch IT 410,000 pixel CCD, and backlight compensation. A 4x digital zoom complements the 2.5- to 6.0-millimeter varifocal, auto iris lens to ensure detailed close-ups.

摄像机还包括红外可拆卸截止滤光片，数字信号处理电路，1/3英尺IT的41万像素CCD以及背光补偿。4倍数字变焦补偿2.5到6.0毫米的变焦距，自动虹膜镜头确保详细的特写镜头。

In fact, so humid were the weather conditions, the LFC TV camera had trouble acclimatising to its new surroundings, with the lens covered in condensation every time we went to record.

事实上，如此高的湿度连LFC TV的摄像机都受不了，差点罢工，摄相机镜头上都是水汽，谢天谢地，咱家的摄像机还蛮高科技，最后总算还能正常工作

Within minutes the men and mechanicals wereashore, racing past the camera.

几分钟之内，这些人和机器装置就上了岸，从摄像机镜头前飞奔而过。

One of the two 4-week-old twin red pandas gets close to the camera at Galloway Wildlife Conservation Park near Kirkcudbright in Scotland.

苏格兰柯库布里的加洛威野生动物保护公园内，一只刚刚出生4个星期的双胞胎粉红小熊猫接近摄像机镜头，正眨巴、眨巴大眼睛看这个世界呢！

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。