摘要
图像采集系统是数字图像处理领域的核心部件之一。在 ＰＣ上开发基于 Ｗｉｎｄｏｗｓ９５／９８的即插即用高速图像采集系统已成为数字图像处理领域的必然发展趋势。针对目前普遍采用的定时器采样方式的缺陷，提出了一种基于事件的多线程帧中断技术以实现高速、准确的图像采集。提出了由虚拟设备驱动程序、标准设备驱动程序以及 Ｗｉｎ３２应用程序组成的三级图像采集系统结构并给出了各部分的完整设计方案及实现细节。特别采用了中断挂接、事件同步、消息传递、双帧存交替以及优先级设定等技术确保图像采集的实时性。
Image capture system is one of the core parts in digital image processing field.The development of Plug- and-Play high-speed image capture system based on Windows95/98 has become necessary trend.Aiming at the shortcomings of popular timer sampling, a multi-thread frame interrupt technique based on event is presented in this paper in order to implement high speed and accurate image capture.A three level architecture including Virtual Device Driver,Standard Device Driver and Win32 application is proposed and complete design schemes and implementing details are also given. Specially,such techniques as interrupt hook,event synchronization, message passing,double frame memory alternation and priority setup are used to insure the real-time performance.
出处
《计算机工程与应用》
CSCD
北大核心
2000年第5期8-11,共4页
Computer Engineering and Applications
基金
公安部项目基金
