论文部分内容阅读
随着微电子、计算机、通信和声像技术的迅速发展,人们已进入一个多媒体的环境。人们可以在计算机上利用集图、文、声、像为一体的多媒体技术观看产品的图像资料、医院的X光片,远方亲朋的形象也能享受到影像的精采场面。在实现上述成果的技术中,利用视频图像捕获卡(以下简称“捕获卡”)捕获图象是基本的手段之一。“捕获卡”可把不同来源的视频信号(摄像机、录象机、视盘机)综合叠加到微机上。当模拟视频信号被数字化之后,可很方便地被存储、编辑和变换。借助“捕获卡”我们可以捕获640*480高质量的现场图象,其捕获的单帧图象可以用BMP、TIFF、MMP、PCX、TGA、JEPG等文件格式存储。但这种方法
With the rapid development of microelectronics, computer, communications and audiovisual technology, people have entered a multi-media environment. People can use the collection of images, texts, sounds and images as a whole to view the images of the products on the computer. The hospital’s X-rays and the image of distant relatives and friends can also enjoy the brilliant scenes of the images. Among the technologies that realize the above-mentioned achievements, capturing video using a video capture card (hereinafter referred to as “capture card”) is one of the basic means. “Capture card” can be different sources of video signals (cameras, video recorders, video machines) integrated on the computer. When the analog video signal is digitized, it can easily be stored, edited and transformed. With the “capture card” we can capture 640 * 480 high-quality live images captured single-frame images can be BMP, TIFF, MMP, PCX, TGA, JEPG and other file formats stored. But this method