数字图像的分数阶微分增强  

A Digital Image Enhancement Algorithm Based on Fractional Difference

作　　者：何远德[1] 

机构地区：[1]西南民族大学外国语学院语言类实验室,成都610065

出　　处：《乐山师范学院学报》2013年第12期46-50,共5页Journal of Leshan Normal University

摘　　要：为了提高图像的纹理细节,提出了一种分数阶对比度增强算法。首先离散化分数阶微分方程得到分数阶微分数值计算方法,并将其推广到二维图像空间,构造了数字图像的分数阶微分增强运算规则和增强模板。实验表明该分数阶微分增强算法能比较明显地增强图像的纹理细节,增强后的图像清晰度显著提高。In order to improve equality of texture, a fractional differential image enhancement algorithm is proposed in this paper. First, discrete expression of fractional differential equations is deduced, and then is extended to two-dimensional image space; furthermore, the rules and mask of fractional differential image enhancement are constructed. The experiments shows that the fractional differential enhancement algorithm can obviously enhance the texture details of the image; and the clarity of enhanced image is significantly improved.

关 键 词：图像增强 分数阶微分 分数阶偏微分 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]