发布时间 : 星期日 文章太原理工大学现代科技学院 毕业设计 - 图文更新完毕开始阅读d8aaceb2c850ad02df804101
基于OV2640视频数据压缩与储存的实现
摘 要
随着近年来信息技术的快速发展，信息的传播速度、方式的提高，人们对图像信息的依赖越来越大，到目前为止，图像处理的应用已经非常广泛，工业、医疗、教育、安防、等等，图像处理已经渗透在我们的生活中。此设计是基于OV2640图像传感器模块与意法半导体（ST）生产的STM32系列微控制器进行图像的采集、压缩、传输以及储存。
此次设计基于STM32F103ZET6与OV2640建立嵌入式图像处理系统，主要设计内容有：硬件电路，主程序、驱动程序的编写，采集后图像的压缩以及STM32上DMA传输的应用。主程序主要负责各个硬件的初始化，以及系统的运行等。驱动程序主要有OV2640图像传感器驱动，控制其采集图像的方式，数据格式，采集速度，等等。TFT-LCD驱动，主要控制其显示，以及初始化序列等。
【关键词】：STM32，OV2640，嵌入式，图像处理
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COMPRESSION AND STORAGE OF VIDEO DATA BASED
ON OV2640
ABSTRACT
As in recent years the rapid development of information technology, improve the speed of information dissemination, way, people depend on the image information more and more, so far, the application of image processing has been very widely, industrial, medical, education, security, and so on, image processing has penetrated in our life. This design is based on the OV2640 image sensor module and the Italian method of semiconductor (ST) production of STM32 series microcontroller for image acquisition, compression, transmission and storage.
The design based on stm32f103zet6 and ov2640 establishment of embedded image processing system, the main content of the design: hardware circuit and the main program, driver program preparation, after the collection of image compression and the application of the STM32 DMA transfers. The main program is mainly responsible for the initialization of the hardware, as well as the operation of the system, etc.. The main driver of the OV2640 image sensor driver, control the way the image acquisition, data format, acquisition speed, and so on. TFT-LCD driver, mainly control the display, and the initialization sequence.
KEY WORDS: STM32,OV2640 ,embedded system ,image processing
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目 录
摘 要 ....................................................................................................................................... IV ABSTRACT ............................................................................................................................. V 第1章 绪 论 ......................................................................................................................... 1
1.1 课题研究的目的及其意义 ........................................................................................ 1 1.2 视频采集、压缩与存储国内外研究现状 ................................................................ 2
1.2.1 图像传感器发展历程 ..................................................................................... 2 1.2.2 图像压缩技术发展 ......................................................................................... 3 1.2.3 图像压缩技术现阶段应用 ............................................................................. 5 1.3 本文的主要内容 ........................................................................................................ 5 第2章 OV2640工作原理及内部结构 .................................................................................. 6
2.1 OV2640简介 .............................................................................................................. 6 2.2 OV2640工作原理 ...................................................................................................... 6
2.2.1 OV2640 传感器功能模块。 .......................................................................... 7 2.2.2 OV2640时序 ................................................................................................... 9 2.3 本章小结 .................................................................................................................. 10 第3章 视频压缩存储系统硬件设计 ................................................................................... 11
3.1 系统结构设计 .......................................................................................................... 11 3.2 图像采集模块电路 .................................................................................................. 11 3.3 微控制器相关电路 .................................................................................................. 12 3.4 本章小结 .................................................................................................................. 14 第4章 视频压缩存储系统软件设计 ................................................................................... 15
4.1 系统流程图 .............................................................................................................. 15 4.2 系统硬件初始化 ...................................................................................................... 16
4.2.1 LED初始化 ................................................................................................... 16 4.2.2 串口初始化 ................................................................................................... 16 4.2.3 按键初始化 ................................................................................................... 16 4.2.4 LCD初始化 ................................................................................................... 16 4.2.5 OV2640初始化 ............................................................................................. 16 4.3 系统主程序设计 ...................................................................................................... 17
4.3.1 OV2640图像采集程序 ................................................................................. 17 4.3.2 直接存储器访问（DMA） .......................................................................... 19
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4.3.3 主函数设计 ................................................................................................... 20
第5章 功能测试结果 ........................................................................................................... 22 第6章 结论 ........................................................................................................................... 24 参考文献 ................................................................................................................................. 25 致 谢 ....................................................................................................................................... 27
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