数码复印机扫描成像单元的研究

A Study on the Scanning and Imaging Unit of the Digital Copier

作为数码复印机的原稿图像输入端,扫描成像单元在数码复印机中起着至关重要的作用。其中是以高速CCD(电荷耦合器件)作为图像传感器,以CPLD(复杂可编程逻辑器件)/FPGA(现场可编程门阵列)作为CCD的驱动控制,以DSP作为基本图像处理单元和图像采集控制单元,以USB2.0为传输方式,实现了原稿图像输入处理系统,完成了图像的快速采集、存储及数据处理。

As the original image input of the digital copier, the scanning and imaging unit plays a very important role in the digital copier. And it uses the high speed CCD as the image sensor. The CCD is controlled by the CPLD/FPGA. The DSP works as the basic image processing unit and the image inquisition controlling unit. The data bus to the PC is the USB2.0. This system implements the original image input and processing. And it completes the high speed image inquisition, storage and processing.