实时电视测量系统中值滤波器设计

A Median Filter Design for Real Time Television Measuring System

在电视测量系统中，为了有效可靠地对目标进行跟踪、测量，有必要对ＣＣＤ传感器输入图象信号进行滤波处理，提高图象信号的信噪比，本文中采用一种适合于硬件实现的流水线中值滤波算法。利用快速ＲＡＭ器件和ＦＰＧＡ器件，完成８ｂｉｔ灰度图象３×３窗口任意形状中值滤波器。并给出理论分析和实验结果。整个电路去噪效果明显。

It is necessary of filter the noise of the input TV signal from CCD sensor to improve the SNR for detecting and tracking the targets effectively and reliably in TV measuring system.A pipeline algorithm for median filter is presented in the paper.The 8 bit gray level image 3×3 window median filter with arbitrary shape is implemented by using FPGA devices and fast randow access memory devices.The theoretical analysis and experimental results are given.The significant result of noise suppression is achieved.