数字图像叠加技术研究.doc

摘 要 随着半导体技术的飞速发展，具有图像功能的嵌入式应用愈来愈多。从数码相机、可视电话、多功能移动电话等消费产品到门禁、数字视频监视等工业控制及安防产品，图像采集和处理已成为重要的组成部分之一。本文所描述的数字图像中叠加十字叉丝，是用于采集后的图像目标位置的标定，运用了数字图像叠加技术标定图片的位置，并在该位置标画出十字叉丝功耗低、体积小、集成度高、速度快及可重复编程和擦写等优点Abstract With the rapid development of semiconductor technology, with the image features more and more embedded applications. From digital cameras, video telephony, multi-function mobile phones and other consumer products to access, digital video surveillance and other security and industrial control products, image acquisition and processing has become an important component of that. This paper describes the digital image in the stack Cross Fork wire technology, is used to collect the images of the calibration target location, using a digital image overlay target in the picture calibration technology to locate and position in the standard cross painted silk fork . With the ultra-large-scale rapid development of digital integrated circuits, use of complex programmable logic devices (CPLD) for circuit design, as the device through software to achieve its features, so the design process will be more flexible faster. CPLD because with the low power consumption, small size, high integration, high speed and re-programming and erase the advantages, based on the CPLDs image is superimposed on a very important practical significance and practical value. Finally, the paper image of the target location stack test results and its simple analysis. Key word: Superimposition Complex pogrammable logic device Image sensor  目 录 摘 要 I Abstract I 目 录 II 第一章 绪 论 - 1 - 1.1 引言 - 1 - 1.2图像叠加技术研究的意义 - 1 - 1.3叠加技术研究的背景 - 1 - 1.4基于CPLD的数字图像叠加十字线研究的主要内容 - 2 - 第二章 CMOS图像传感器原理 - 3 - 2.1 CMOS图像传感器像元结构的种类 - 3 - 2.2 CMOS图像传感器OV7620 - 4 - 2.3 可编程逻辑器件 - 7 - 2.3.1 固定逻辑与可编程逻辑 - 7 - 2.3.2 PLD的发展 - 7 - 第三章 图像叠加电路硬件组成 - 10 - 3.1硬件系统设计 - 10 - 3.2 EPM7128芯片 - 10 - 3.3 AVR单片机AT90S8515 - 11 - 3.4 USB接口器件PDIUSBD12 - 13 - 3.5 静态存储器HM628512 - 13 - 第四章 图像叠加软件原理分析 - 15 - 4.1 OV7620的参数 - 15 - 4.2 设计方案及实验结果 - 16 - 第五