中山大学学报自然科学版 ›› 2017, Vol. 56 ›› Issue (2): 80-87.

• 研究论文 • 上一篇    下一篇

前置逐点亮度修正处理算法

郝亚茹1,邓招奇1,严飞2   

  1. 1.电子科技大学中山学院,广东 中山 528402;
    2.南京信息工程大学信息与控制学院,江苏 南京 210044
  • 收稿日期:2016-07-11 出版日期:2017-03-25 发布日期:2017-03-25
  • 通讯作者: 邓招奇(1981年生),男;研究方向:全彩LED显示屏软件控制及色度学理论;E-mail:53962791@qq.com

The preprocessing algorithm for point by point luminance correction

HAO Yaru1,DENG Zhaoqi1,YAN Fei2   

  1. 1.University of Electronic Science and Technology of China, Zhongshan Institute,  Zhongshan 528402, China;
    2.School of Information and Control, Nanjing University of Information Science and Technology, Nanjing 210044, China
  • Received:2016-07-11 Online:2017-03-25 Published:2017-03-25

摘要:

逐点校正算法为基础,提出一种完全独立于显示控制系统的前置处理方案。该处理方案以DVI接口为传输介质,可完成对任意分辨率、任意格式的图像信息的亮度逐点校正。在现有逐点校正模型的基础上,实现前置处理方案中的亮度修正算法模型;根据算法模型中校正参量的聚集特性,同时采用压缩校正参量取值范围的方法和数值重组的方式来提高SDR SDRAM的频率,据此设计的数字电路可以实现对任意分辨率、任意传输格式的数据进行逐点亮度校正功能;通过理论和定量计算以及实际观测前置法和后置法的应用效果,得出结论:前置法产生的不一致性的灰度级数大于后者,并且灰度级越低,校正的不一致性越差,但前置法的灵活性和通用性明显优于后置法。

关键词: 前置处理器, DVI传输格式, 压缩取值, 数值重组

Abstract:

Based on the brightness correction algorithm, a pre-processor scheme is proposed. The processor can realize the function of point by point correction for image data of arbitrary resolution and arbitrary transmission format. The pre-processor is completely independent of the display control system. Firstly, the model of point by point luminance correction algorithm is introduced. On the basis of the model, the model of point by point correction algorithm which is used to the preprocessor is derived. Then the design structure of the current hardware condition is analyzed based on this model, which mainly to SDRAM SDR frequency as the bottleneck analysis, According to the aggregation characteristics of the correction parameters, the method and numerical reconstruction of the range of compression correction parameters are adopted. The frequency of SDR SDRAM was indirectly improved. The data of any resolution and arbitrary transmission format can be handled by the point by point correction technology which is in the pre-processor. Finally, The application effect of pre method and post method is analyzed. It is concluded that the effect of pre method is worse than that of the post method, especially on the performance of low gray level uniformity. The flexibility and versatility of the prefix method is superior to the post method.

Key words: pre-processor;DVI transport format;compression value, numerical recombination

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