计算机应用 ›› 2014, Vol. 34 ›› Issue (7): 2001-2004.DOI: 10.11772/j.issn.1001-9081.2014.07.2001

• 虚拟现实与数字媒体 • 上一篇    下一篇

基于场景分类的细节保留直方图均衡算法

胡静,马晓峰,盛卫星,韩玉兵   

  1. 南京理工大学 电子工程与光电技术学院,南京 210094
  • 收稿日期:2014-01-16 修回日期:2014-03-11 出版日期:2014-07-01 发布日期:2014-08-01
  • 通讯作者: 胡静
  • 作者简介:胡静(1989-),女,江苏淮安人,硕士研究生,主要研究方向:图像增强;马晓峰(1981-),男,江苏吴江人,讲师,主要研究方向:视频图像处理、雷达信号处理、数字波束形成、智能天线;盛卫星(1966-),男,江苏启东人,教授,博士生导师,主要研究方向:雷达目标特性建模与目标识别、微波成像与微波信息处理、数字波束形成技术与智能天线;韩玉兵(1971-),江苏江都人,副教授,博士,主要研究方向:数字图像、视频处理、阵列信号处理、无线通信。

Scene classification based details preserving histogram equalization

HU Jing,MA Xiaofeng,SHENG Weixing,HAN Yubing   

  1. School of Electronic Engineering and Photoelectric Technology, Nanjing University of Science and Technology, Nanjing Jiangsu 210000, China
  • Received:2014-01-16 Revised:2014-03-11 Online:2014-07-01 Published:2014-08-01
  • Contact: HU Jing

摘要:

针对传统直方图均衡算法细节丢失和亮度饱和的问题,提出一种将场景分类和细节保留相结合的直方图均衡改进算法。利用图像的直方图特征进行场景分类,结合场景分类及图像像素点的特征对分段式直方图均衡处理方法的参数进行优化。改进后的算法复杂度仅为O(L)(L是图像的像素灰度级),既保留了直方图均衡算法计算量小的特点,又能避免传统直方图均衡的细节丢失和亮度饱和问题,还具有适用于不同场景的稳健处理效果。通过德州仪器公司DM648平台实测验证,该算法可以用于实时视频图像的增强。

Abstract:

Due to the swallow and over-enhancement problems of traditional histogram equalization, an improved histogram equalization algorithm combining scene classification and details preservation was proposed. In this algorithm, images were classified according to their histogram features. The parameter of piecewise histogram equalization was optimized according to the scene classification and the characteristics of image histogram. The complexity of the improved algorithm is only O(L).L is the level of image grayscale, and equals to 256 here. The improved algorithm has the small amount of computation and solves the swallow and over-enhancement problems of traditional histogram equalization. The results from TI (Texas Instruments) DM648 platform show the algorithm can be used for real-time video image enhancement.

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