【摘要】 介绍了一种用于可见光—红外双波段实时图像融合平台上的双通道视频采集系统的设计与实现方案。由于大规模可编程逻辑器件(CPLD)的可定制性,系统可以实现640×320、320×240等多种分辨力图像的采集。采用“乒乓”帧存结构,解决共用存储器时的资源冲突问题;利用数据拼接设计,来提高DSP对外部数据总线的访问效率。整个系统结构清晰,功能完整且具有灵活的可定制性,不仅可以完成两个通道视频信号的独立数字化采集工作,还实现了图像的手动像素平移配准功能,应用于多通道图像采集和融合系统中,取得了良好的效果。更多还原

【Abstract】 A dual-channels video signal sampling system specialized for real-time image fusion that processing of visible and infrared band images was introduced in the paper. Owing to the flexibility of CPLD,the system can easily realize the collection of various picture formats such as 640×320 and 320×240. Through "ping-pong "structure to solve the shared memory conflict;utilizing data merge to improve the DSP access efficiency to the external data bus. This system can realize not only two-channel video signal sampling independently, but also the manual image registration. The system has been applied to a multi-channel grabbing and fusion system. The effect is satisfying.更多还原