【正文】 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 III implement. CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 Final, the test of the system39。s hardware and software. The test results show that the design achieved the acquistion function and good performance. At the same time, the system achieved the expected acquisition speed and quality of the collected image. Keywords: Scanner, CCD, Manmachine interface, Multithread, Memory managementII ABSTRACT The MultiCCD scanners which are widely used in printing, scientific research, medical and other fields have important applications in opticalelectronicmachinery integration equipment. At present, with the rapid development a lot of industries need to archive large format materials. Therefore, the demand for largeformat scanner is increasing, while promoting the development and production of large format scanners. The main work of the largeformat scanner is to convert the analog signal to the digital signal which the puter can identify after converting the image39。s optical signal to the analog signal. In order to scan large format images, an effective approach is to capture images through multiple sensors, then splice the image to plete the largeformat scanner39。s work. The scanner use four same type CCD to capture the images then splice them into one. While the four CCDs scan asynchronously to acplish the photoelectric conversion in the process. The main work of this paper can be divided into two parts, hardware and software design. The first part is the hardware work, after analyzing the large format scanner39。s working principle and hardware system39。s performance parameters the development content and focuses of the work of largeformat scanner has been determined. The devices have been selected according to the parameters. Then we finished the scanner hardware circuit design and FPGA39。s timing design including the driver and configuration of the digitaltoanalog conversion chip. This is the important factor to the image quality. Converting the optical signal to the analog signal laid a foundation to enhance image quality which is the key to largeformat scanning. The second part is about the upper software system development. About this the paper introduced the demand, the division of the functional modules of the software and the threetier structure of the largeformat scanner software system firstly. Then the paper detailed the scanning interface design and implementation, focused on the design ideas of the multithreaded parallel data acquisition and memory management strategy to deal with the large amount of image data. This content is directly related to the focus of the user application experience of the largeformat scanner, also is the the focal point to theIV 目 錄 第一章 引言 .................................................................................................................. 1 課題的來源及其意義 .......................................................................................... 1 國內(nèi)外發(fā)展現(xiàn)狀及趨勢 ...................................................................................... 1 研究的主要內(nèi)容 .................................................................................................. 2 論文的組織結(jié)構(gòu)及章節(jié)安排 .............................................................................. 2 本章小結(jié) .............................................................................................................. 3 第二章 多 CCD 掃描儀概述 ....................................................................................... 4 掃描儀的原理 ...................................................................................................... 4 圖像采集系統(tǒng) ...................................................................................................... 5 圖像采集卡 ..................................................................................................... 5 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 CCD 的圖像采集軟件系統(tǒng)的設(shè)計與實現(xiàn) _碩士學位論文 光源 ................................................................................................................. 5 光學系統(tǒng)對成像質(zhì)量的影響因素 ................................................................. 6 掃描儀性能參數(shù) .................................................................................................. 6 掃描儀工作流程 .................................................................................................. 6 奧普易掃描儀的特性描述 .................................................................................. 7 本章小結(jié) .............................................................................................................. 9 第三章 多 CCD 掃描儀硬件驅(qū)動軟件系統(tǒng)設(shè)計與實現(xiàn) ......................................... 10 CCD 及 A/D 外圍驅(qū)動電路設(shè)計 ...................................................................... 10 CCD 外圍電路設(shè)計 ...................................................................................... 10 WM8200 功能與特性 ....................................................................................11 WM8200 外圍電路設(shè)計 ............................................................................... 13 基于 FPGA 圖像采集驅(qū)動軟件設(shè)計的特點 .................................................... 14 FPGA 概述 .................................................................................................... 14 FPGA 芯片結(jié)構(gòu)特點 .................................................................................... 15 利用 FPGA 進行數(shù)據(jù)處理的優(yōu)勢 ............................................................... 18 硬件驅(qū)動軟件系統(tǒng)的功能及需求劃分 ............................................................ 19 系統(tǒng)總體方案設(shè)計 ............................................................................................ 19 自頂向下（ TopDown）設(shè)計的基