【作者】 叶微微；

【导师】 张二虎；

【作者基本信息】 西安理工大学 ， 信号与信息处理， 2008， 硕士

【摘要】 目前,国内印刷业为了在激烈的竞争中进一步提高印刷质量和生产效率,一些企业相继引进了国外的各种油墨预置系统,通过它在开机前预先调整印刷机的墨键,从而使第一张印张的着墨情况尽可能与印刷成品接近,但这一技术在实际应用中却不尽人意,主要是人们对这一新技术不够了解,对油墨预设信息的来源不准确,而这一过程的影响因素又特别多。因此,基于JDF油墨预置的研究对印刷业的发展有着极为重要的意义。针对以上问题,本文提出了一种基于JDF数字化流程的油墨预置技术,并在VC++的平台下完成了这一技术系统的设计实现。该系统一方面以JDF文档中的油墨预置信息为依据,另一方面以RIP后拼大版的1-bit tiff文件版面信息为基础,分析得到各墨区的网点面积率后,结合CMYK四色转移曲线来确定相应的墨刀开度,并将其用于印刷机墨键的预调整,从而实现油墨预置。采用这种高效的信息传递模式,确保了更高的精确度,大大提高了印刷机墨区分配的合理性和准确性。同时为多机组间的质量均衡提供了管理依据,也为企业采用数字化生产及管理流程提供了保障。实验表明该方法油墨预置的效果较好,能达到缩短开机时间,减少废报,提高印刷质量的目的。此外,由于该技术在信息存储传输中采用了JDF和Txt两种形式,与CIP4油墨预置系统相比,能更好地实现国内数字化信息的共享,应用将更加广泛。更多还原

【Abstract】 At present, in order to improve quality and efficiency further in furious competition ,many inland enterprises ,one after the other, introduced all kinds of ink presetting system from abroad .which can pre-adjust ink key in printing machine before it starts working. So that the ink on the first sheet can be consistent with the presswork as soon as possible. But it doesn’t work so well in its applications. The main reason is that people don’t know this new technology and origin of ink presetting information is inaccurate, moreover the course can be influenced by many factors. Therefore, the research of ink presetting based on JDF has special significance in the development of print.So, an ink presetting method based on JDF digital technology has been proposed and designed under VC++ platform in this paper. With this method, either JDF files or 1-bit tiff files after RIP can be accepted .Based on this information, dot area corresponding inkzone will be obtained and then converted to blade opening after being combined with CMYK transfer curves. Then, pressman can preset ink key with the opening data. Since the effective transmission model of information insures higher precision, the rationality and veracity of inkzone distributing will be improved greatly. Meanwhile, it provides management warrant for the equilibrium of quality among several printing unites, and ensures the digital production and management flow in printing enterprise.It proved that the method has good performance, can shorter make-ready time, reduce paper waste largely, improve quality of printing process greatly. Furthermore, because the presetting data is saved in both JDF and txt files ,it will be more easy to realize sharing of digital information compared with CIP4 ink presetting system. Therefore, it will be more popular in inland print.更多还原