• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2006, Vol. 28 ›› Issue (2): 54-56.

• 论文 • 上一篇    下一篇

基于直方图的图像增强及其MATLAB实现

汪志云[1] 黄梦为[2] 胡钋[1] 饶强[1]   

  • 出版日期:2006-02-01 发布日期:2010-05-20

  • Online:2006-02-01 Published:2010-05-20

摘要:

图像增强是数字图像的预处理,对图像整体或局部特征能有效地改善。我们讨论了基于直方图的均衡化和规定化处理的图像增强技术基本原理,给出了相关推导公式和算法; 同时,以一个灰度图像为例,用MATLAB语言实现了直方图均衡化和规定化增强处理,并给出了具体程序、实验结果图像及直方图。结果表明,直方图均衡化和规定化处理能有
有效改善灰度图像的对比度差和灰度动态范围。

关键词: 图像增强 直方图 均衡化 规定化 灰度级 MATLAB

Abstract:

Image enhancement which is also called image pre-processing plays an indispensable role m signal Image processing. This article introduces two kinds of algorithm-hlstogram equalization and histogram specifications, gives an experimental result based on MATLAB. From the relevant images and histograms of realization, it is clear that histogram enhancement can improve the contrast details and equalize the dynamic range of image gray level.

Key words: image enhancement, histogram, equalization, specification, gray level, MATLAB