视频采集卡

Finally a all-digital recorder system based on RAID5 which has a RT-Linux real-time software operation system and intermediate/video frequency acquisition card driver to overcome such problems as real-time quality reliability chunnel expansibility and standardization.

最终提出了以RT-Linux实时操作系统为软件平台和专门设计的中频和视频采集卡驱动为底层硬件平台的基于RAID5阵列的全数字记录系统，全面解决了记录实时性、可靠性以及通道扩展性和标准化的技术难题。

The Image Acquisition Toolbox provides functions for acquiring images and video from PC-compatible frame grabber cards and video devices.

该图像采集工具箱提供职能获取图像和视频从PC兼容的图像采集卡和视频设备。

In this case, it is possible to place one video card with interface PCI express x16, which possesses two-slot cooling system.

在这种情况下，是有可能发生的一个视频采集卡接口pci express x16接口，它拥有双插槽散热系统。

The system makes use of the high-speed synchronous shoot and digital image processing technique to make the presswork figure redisplay stationary in the display apparatus.

本系统采用高速高精度的工业彩色CCD摄像机，在横向移动扫描装置和纵向扫描控制算法以及同步发生装置和同步瞬态采集方法的控制下，实时地摄取印刷品图像，并将视频信号输入到彩色图像采集卡。

Nowdays,the infrared camera in our country can export video signal and digital image signal. The video signal can display on the screen through the general grab card, but the digital one can not be inputted into computer without special image grab card. In this paper, an infrared image grab card and the correlative program driver are designed based on the analysis of the universe technology.

目前的国内的红外热像仪能够输出一组视频信号和数字图像信号，虽然视频信号能够通过普通采集卡在监视器显示，但是输出的数字图像信号不能直接输入到电脑上进行处理。

Most of video monitoring systems on the market are composed of industrial control computer which work unstably, and the price is too high.

现存的视频监控系统主要由工控机和视频图像采集卡构成，存在系统稳定性差、价格高昂等缺点。

To keep our example fairly simple we will assume a card that supports overlaying a flat rectangular image onto the frame-buffer output, uses chromakey for selecting the region on which to draw, and can also capture video into processor memory.

为了保持我们的示例相对简单，我们假设采集卡支持覆盖一副平面长方图像到帧缓存输出，色度键控技术用来选择绘图区域，当然我们也要支持采集视频到处理器的内存。

The toolbox supports frame grabbers from Matrox and Data Translation and video capture devices, including Web cameras and USB and Firewire scientific video cameras.

工具箱支持的Matrox图像采集卡和数据从翻译和视频采集设备，包括网络摄像头和USB和Firewire科学摄像机。

In our research, marked autologous fluorescent blood red cell is immitted into SD-rat body and the whole process is shown and recorded by microscope image system.

利用做过荧光标记的自身红细胞注入SD大鼠体内，通过显微图象系统将整个过程以视频信号的形式存贮，然后利用基于视频图象的采集卡，将流速变化过程回放采样，得到暗视场下的荧光图象，利用图象分析和处理的方法，测定血流速度。

The first step is to eliminate all kinds of noises generated in the process of collecting traffic video by means of median filter; Then we finish image sharpening with Laplace operator to clarify edges of the video images; finally, image contrast is enhanced with the help of the second-developing packet SDK-2000, which is provided by our video-collecting card. This way, much more satisfactory images are obtained, and preparation is already made for the following work, thats image analyse.Thirdly, according to the characteristics of our system, mobile objects are distinguished by means of image difference. Then some features such as regional area, length and width of traffic objects are selected and extracted. After processing of scale filter, we successfully recognize those moving vehicles appearing in the monitoring regions.Fourthly, some corresponding algorithms are brought forward to automatically identify those familiar traffic peccancies of many sorts, such as red light violation, yellow-line covering, parking in prohibited spots, over-speed running and converse running. Then we find means to snap pictures and to intercept videos of the spot, and collect a lot of relevant information such as the time, the block, the running direction and the weather conditions and so on. According to this information, our traffic management departments could make correct decisions on punishing those drivers who have broken the traffic rules.Considering the complexity of traffic environments on particular blocks, in order to monitor other traffic peccancies effectively, we also have designed the scheme to carry out traffic monitoring by manual.

首先运用中值滤波法对视频图像进行去噪处理，然后采用二阶差分法进行图像锐化，再通过视频捕获卡携带的二次软件开发包SDK-2000进行对比度增强，从而得到比较理想的图像，为后续的图像分析工作做准备；第三，根据系统特点，通过背景图像差分法，分割出监测区中的运动目标，然后对交通目标的区域面积、长度和宽度等进行特征提取，再经过尺度滤波处理，从而自动识别出机动车辆目标：第四，分别设计相应的算法，实现对闯红灯、压黄线、违章停车、违章超速及违章逆行等常见的交通车辆违章行为的自动识别，并自动抓拍违章现场，截取违章视频，采集其它相关违章信息，为交通执法部门进行交通违章处罚提供有力依据：考虑到特殊路段特殊环境下的交通复杂性，为了有效监控其它类型的交通违章行为，本文还设计并实现了对交通违章的手动监控模式。

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。