红外图像高速实时存储系统设计

Infrared Image High-speed and Real-time Recording System Design

摘要:

针对红外图像具有分辨率低、帧频高的特点,以及目标特性分析和图像处理算法验证需要完整、无损记录图像数据的要求,提出了一种高速数字图像传输记录系统方案;方案采用HOTLinkⅡ＋FPGA＋PCI的体系结构,数据通过同轴线从红外图像设备传输到图像记录设备的CYP15G0101芯片,实现了远距离的点到点可靠传输和解码;FPGA和PCI接口芯片对图像数据进行接收和缓冲,工控机软件通过调用PCI SDK提供的API函数实现对PCI接口芯片的初始化、控制和数据传输等操作,从而将图像数据按照预定的格式连续地写入物理上连续的硬盘存储空间,最终实现数据记录、回放和分析等功能;该方案已经成功应用于某型红外图像记录设备并经过长时间测试,记录时间、漏记率等指标和回放等功能均满足研制要求。

Abstract:

Infrared image has the characteristics of low resolution and high frame rate. Target infrared features analysis and image processing algorithms need to lossless image data recording. To achieve these requirements, a design approach for the high-speed digital image transmission and recording system is presented. The approach adopts an overall structure of HOTLinkⅡ+ FPGA + PCI. Data is transferred from the infrared image device to the CYP15G0101 chip of the recording device through coaxial cable and a reliable point-to-point remote transmission is achieved. FPGA and PCI interface chip are used to realize data receiving and buffering. Software achieves facilities such as initialization, control and data transmission of the PCI chip by calling SDK API functions. Image data is continuously written into the hard disk, according to the predetermined format. Finally, functions such as data recording, playback and analysis are realized. The approach has been successfully applied to an infrared image recording device. After a long time test, recording time, omission rate and playback functions all meet the design requirements.