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数字印前的主要设备包括将影像输入、处理、输出等设备。

数字印前的影像输入设备有那些？

主要输入设备是扫描机(Scanner)，它是用来将照片、幻灯片或手绘原稿转换为数字数据的设备。可分为两大类﹕平台式扫描机和滚筒式扫描机，平台式扫描机的原稿架为平面，结构紧凑，采用CCD（电荷耦合器）作为感光组件；滚筒扫描机的原稿架则为透明压克力滚筒，结构复杂，采用PMT（光电倍频器）作为感光组件。

随着CCD技术的发展，现在市场上有由低价位的黑白扫描机到高价位的专业彩色扫描机各种系列的平台式扫描机，专业平台式扫描机通常比传统滚筒式扫描机便宜，但他们在扫描时能得到相近的品质。

数字印前的处理设备有那些？

主要是计算器系统(ComputerSystems)，它有Macintosh与PC两种，无论选择那种计算器，处理器的速度一定要最快的，也可考虑选购双CPU机种来加快处理的速度。MAC可选购G4或G5，PC则要选择P4以上，并要内建USB接口；1GB以上RAM，显示器要选高档品，硬磁盘驱动器要越高越好，附加的DVD光盘、MO、UPS、DiskArray等附属装备也必须齐全。

另外，RIP（Raster Image Processor）是用来将页面描述语言（PDL），如PostScript，转换为控制输出设备的讯号，使输出设备能依据页面描述语言的叙述而输出该文件，其方式是将文件转换成点对应模式，然后驱动输出装置，用雷射照射在底片或相纸上，以雷射点的方式形成影像。RIP一般可以分为硬件RIP和软件RIP两种，输出设备则可以是各种彩色或黑白的雷射、喷墨、热转印或热升华打印机，以及照排机、阳图记录器等，PostScript已是目前输出档案的标准。

硬件RIP：将RIP的程序存入计算器的ROM中，专门用于处理大量复杂的材料，其硬件架构与计算器一样，配有CPU、大容量的RAM、浮点运算器、网点产生器的加速卡、硬式磁盘机（储存中英字体）等等，整个硬件RIP的架构是专门用来执行RIP的功能。

软件RIP：软件RIP为一种程序，可以在一般用途的计算器上(如个人PC、MAC、SUN等）执行，是以软件形态存储计算器里，同一般应用程序一样，要进行RIP处理时再执行它。软件RIP和硬件RIP的功能是相同的，在同时期或许硬件的RIP会较软件的RIP来得快，但?着个人计算器处理速度的加快，价格的下降，软件RIP所具有的“可升级性、低成本”等特点是硬件RIP所?有的，相信未来软件RIP将会具有相当可观的市场。

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