【正文】 關(guān)鍵詞： linnux 嵌入式 圖像處理 邊緣檢測(cè) Abstract This paper expounds the application of digital image processing and some basic principles. The use of S3C2440 processor chip, the Linux kernel to construct a simple embedded image processing system. The system uses uboot as the bootloader to boot the Linux kernel and loaded with file system, Linux kernel and file system are used to menu configuration to make corresponding configuration. The application interface is made using QT, system is mainly to achieve some simple image processing functions, such as gray, enhancement, edge detection. The whole procedure is prepared based on the C++, so some image transform algorithm may not be optimal, but it can meet the basic requirements. On this basis, but also on the system constantly improve. Keywords:linux embedded system image processing edge detection 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第 I 頁(yè) 共 II 頁(yè) 目錄 第一章 緒論 .......................................................................................................... 1 數(shù)字圖像處理概述 ................................................................................. 1 數(shù)字圖像處理現(xiàn)狀分析 ......................................................................... 5 本文章節(jié)簡(jiǎn)介 ......................................................................................... 8 第二章 圖像處理理論 .......................................................................................... 8 圖像信息的基本知識(shí) ............................................................................. 8 視覺(jué)研究與圖像處理的關(guān)系 ...................................................... 8 圖像數(shù)字化 ................................................................................ 10 圖像的噪聲分析 ........................................................................ 10 圖像質(zhì)量 評(píng)價(jià) ............................................................................ 11 彩色圖像基本知識(shí) .................................................................... 11 圖像變換 ............................................................................................... 13 離散傅里葉變換 ........................................................................ 13 離散沃爾什 哈達(dá)瑪變換（ DWTDHT） ................................... 20 離散余弦變換（ DCT） ............................................................. 21 離散圖像變換的一般表達(dá)式 .................................................... 23 圖像壓縮編碼 ....................................................................................... 24 圖像編碼的基本概念 ................................................................ 24 圖像增強(qiáng)和復(fù)原 ................................................................................... 24 灰度變換 .................................................................................... 24 圖像的同態(tài)增晰 ........................................................................ 26 圖像的銳化 ................................................................................ 27 圖像分割 ............................................................................................... 27 簡(jiǎn)單邊緣檢測(cè)算子 .................................................................... 27 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第 II 頁(yè) 共 II 頁(yè) 圖像描述和圖像識(shí)別 ........................................................................... 28 第三章 需 求分析 ................................................................................................ 28 系統(tǒng)需求分析 ....................................................................................... 28 可行性分析 ........................................................................................... 28 系統(tǒng)功能分析 ....................................................................................... 29 第四章 概要設(shè)計(jì) ................................................................................................ 29 圖像采集 ............................................................................................... 30 圖像存儲(chǔ) ............................................................................................... 31 圖像處理（ image processing） ........................................................... 31 圖像顯示 ............................................................................................... 32 網(wǎng)絡(luò)通訊 ............................................................................................... 32 第五章 詳細(xì)設(shè)計(jì) ................................................................................................ 32 Linux 嵌入式系統(tǒng)的構(gòu)建 ...................................................................... 33 啟動(dòng)引導(dǎo)程序的移植 ................................................................ 33 Linux 內(nèi)核移植 ........................................................................... 33 根文件系統(tǒng)的移植 .................................................................... 34 圖像處理功能的實(shí)現(xiàn) ........................................................................... 34 彩色圖像的灰度化 .................................................................... 34 灰度圖的直方圖均衡化增強(qiáng) .................................................... 35 圖像二值化 ................................................................................ 35 邊緣檢測(cè) .................................................................................... 36 第六章 調(diào)試與維護(hù) ............................................................................................ 36 附錄 A ................................................................................................................. 37 參考文獻(xiàn) .............................................................................................................. 43 致 謝 ...................................................................................................................... 44 中北大學(xué) 2020 屆畢業(yè)設(shè)計(jì)說(shuō)明書(shū) 第 1 頁(yè) 共 45 頁(yè) 第一章 緒論 數(shù)字圖像處理概述 數(shù)字圖像處理 (Digital Image Processing)又稱為計(jì)算機(jī)圖像處理，它是指將圖像信號(hào)轉(zhuǎn)換成數(shù)字信號(hào)并利用計(jì)算機(jī)對(duì)其進(jìn)行處理的過(guò)程。 該系統(tǒng)使用 uboot 作為啟動(dòng)引導(dǎo)程序來(lái)引導(dǎo) linux 內(nèi)核以及加載跟文件系統(tǒng)，其中 linux 內(nèi)核與跟文件系統(tǒng)均采用菜單配置方式來(lái)進(jìn)行相應(yīng)配置。使用 S3C2440 處理器芯片，linux 內(nèi)核來(lái)構(gòu)建一個(gè)簡(jiǎn)易的嵌入式圖像處理系統(tǒng)。在此基礎(chǔ)上還會(huì)對(duì)系統(tǒng)進(jìn)行不斷地完善。 隨