一种CCD图像相关处理系统的FPGA+DSP实现

Implementation of A Real-Time Digital Image Processing System Based on FPGA and DSP

在卫星观测系统中,CCD相机对高精度图像实时跟踪时,为得到高信噪比高分辨率的图像,必须对图像进行实时相关处理.而现有软件实现速度不高,不能实现其实时性.本文在分析图像相关处理快速算法的基础上,使用Altera的QuartusII软件,完成了其中的核心模块———FFT算法的硬件实现,提高了处理速度;并运用DSP处理器,设计了一个基于FPGA的实时数字图像处理系统.文中给出了系统的硬件电路和软件算法模块.仿真和调试结果表明:用FPGA与高速数字信号处理算法的结合,可以满足系统对图像进行实时处理的要求.

In this paper, in order to satisfy the real_time requirements of the picture correlation processing when the CCD correlation tracker tracks image signal in the observation from satellites to the earth, the fast algorithm of the picture correlation processing technique is discussed, while its kernel module_FFT function is implemented by FPGA to increase the working speed. On the basis of this, a real_time digital image processing system based on FPGA and DSP is designed. At the same time, the design of hardware and software arithmetic of this system is presented respectively. The result of simulation and experiment proves that the combination of FPGA and high_speed digital signal processing algorithm can meet the real_time requirements of picture correlation processing in the CCD correlation tracker.