文档介绍：摘要
在现代光电探测领域中对实时图像的检测一直处于非常重要的地位并在图像处
理系统中得到了广泛的应用如电视制导系统医用电子内窥镜和银行超市用电视监
视系统等但应用超广角镜头的成像系统在提供大的成像范围的同时也带来了严重的
图像畸变使得检测目标难以辨认或辨认不准确特别是对带有短焦距镜头的 180o 超广
角系统畸变尤其严重因此为了准确还原原始图像需要利用数字图像处理技术对畸
变图像进行校正
本文根据超广角系统成像的特点选择了合适的图像畸变校正算法设计了基于
硬件系统的算法实现方案完成了对畸变图像的校正处理实现了 DSP 硬件系统与 PC
机 PCI 总线的通信主要完成了以下工作
(1) DSP 系统硬件板设计
(2) 计算机 PCI 总线和 DSP 的 HPI 接口数据交换的实现
(3) 超广角成像系统图像畸变校正算法模型设计
(4) DSP 设计和优化
(5) DSP 系统的自举
数字图像处理技术在实际应用中的主要困难在于数字图像的数据量非常大实时处
理要求计算速度极高本文设计的图像处理系统硬件板充分利用了数字信号处理器的优
点把超广角成像系统的畸变校正算法全部交给 DSP 硬件处理并将还原后的图像数
据经过 PCI 总线送往计算机进行后续处理也可以直接显示
关键词超广角成像畸变校正 DSP PCI 总线
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ABSTRACT
In modern opto-electronics detection field, the real-time image detection technique is
very important, it is widely used in many practical image processing systems. Such as TV
control and guide system, electronic endoscope in iatrical, monitor system in supermarket and so
on. However in most of the applications, image distortion will be brought in due to the using
of wide-angle lens in the image processing system, especially in systems using 180o
wide-angel short focus lens. While the using of wide-angle ensl achieves a wide imaging
range, it also leads to serious image distortion which makes the imaging identification of
objects very hard. So image processing systems must use digital imaging technic to revert the
distortion image.
This article use an appropriate arithmetic base on the characteristic of the wide-angel lens
to revert the distortion image , and achive the revert image by the image processing system
using DSP as kernel. The system also achieve munication between DSP and PCI to
transfer the image data. The key point of the system contains:
(1) hardware design base on the dsp;
(2) Communication between DSP and PCI to transfer the image data;
(3) Image distortion revert arithmetic model of the wide-angel lens;
(4) Optimizing the image distortion revert arithmetic;
(5) Bootloader design of the system
The ma