微机图象处理系统及其FFT算法

Microcomputer Image Processing System and FFT Algorithm

该文主要介绍由 PCVISIONplus帧捕获器组成的微机图象处理系统的结构和编程原理 .计算机在处理数据时 ,与硬盘交换数据非常费时 .为了解决这个问题 ,该文研究了一个基于 DFT性质的算法 ,采用这个算法 ,不需要与硬盘交换数据就可在微机的常规内存中实现 FFT和对图象进行频域处理 .从而大大加速了图象处理的速度 .采用这种算法在该系统上对 X光片进行了处理 ,结果表明 ,该算法是有效和快速的 .

In this paper, a microcomputer image processing system using a PCVISIONplus Frame Grabber is built, and the principle for writing the programs is explained. Because it takes much time to exchange the data with hard disk, so an algorithm based on the properties of DFT is described in order to resolve this problem. The FFT and the image frequency domain processing can be carried out in the conventional memory of a microcomputer using the algorithm without exchanging the data with hard disk. The speed of the image processing was speeded up. A lot of X radiology have been processed with the algorithm in the microcomputer image processing system. The result shows that the proposed algorithm is efficient and fast.