【作者】 李凯；

【导师】 王泉；

【作者基本信息】 西安电子科技大学 ， 计算机系统结构， 2011， 硕士

【摘要】 能够直接打印U盘等便携式存储器上图像的大幅面喷墨打印机具有较大的市场需求。这类打印机所有的图像处理完全由嵌入式计算机完成，处理的数据量较大，但通常其硬件资源和性能有限。对图像数据的处理性能和数据重组的处理性能是此类打印机发展的关键因素。论文分析了大幅面喷墨打印机的结构、原理以及大幅面喷墨打印机中采用的半色调算法；针对直接打印便携式存储器中图像的需求，设计了一个基于ARM11的大幅面喷墨打印机嵌入式计算机；利用嵌入式计算机上集成的USB主机接口和高速SD卡接口，实现了对U盘、SD卡等便携式存储器上图像的直接读取；结合硬件资源，设计并实现了误差扩散半色调处理，以及根据打印喷头对打印数据的重组处理；通过模拟打印喷头读取数据打印的过程，验证并测试了嵌入式计算机的处理性能。本文对可直接打印便携式存储器中图像的大幅面喷墨打印机的关键技术做了深入的研究，这些技术可直接应用于大幅面喷墨打印扫描复印一体机中，对同类产品开发具有一定的参考意义。更多还原

【Abstract】 There is great market demand for large format inkjet printer which can directlyprint images from the portable storages such as U disk etc. Embedded computercomplete all image processing of this type printer which have large amount of dataprocessing, but usually it have limited hardware resources and performance. So theperformance of processing image data and restricting printing data is key factor for thedevelopment of this type printer.The paper describes the structure and working principle of large dimension inkjetprinter and halftoning algorithm adopted in the printer; according to the requirementsof printing images from portable storages directly, a general scheme of embeddedcomputer of large format inkjet printer is designed based on ARM11; directly readingimages from U disk, SD card and other portable storages has been realized by usingmain embedded computer’s integrated USB host interface and high-speed SD card’sinterface; combined with existing hardware resources, we design and have implantedError Diffusion Halftone processing, and also rearrange the printing data according tothe print nozzle. We simulate the process of print nozzle reading printing data, verifyand test the processing performance of embedded computer.We take further research for the large format inkjet printer’s main technology thatit can print images from portable storages directly, these main technologies can bedirectly applied to large format inkjet printer which can print copy and, and canprovide with certain reference for similar product’s development.更多还原