计算机应用研究Issue(5)：1597-1600,4.DOI:10.3969/j.issn.1001-3695.2015.05.079
数字图像的分数阶微分自适应增强
Adaptive fractional differential algorithm for image enhancement
摘要
Abstract
In order to determine the appropriate differential order when fractional differential being applied to image enhance-ment,this paper proposed an adaptive method.First of all,it analyzed the facts that enhancement effect increased with fractional differential order when order was in a certain range,and the just noticeable difference (JND)increased with average brightness of the image.Then,together with results mentioned above,it established a piecewise function to determine adaptive order ac-cording to the overall gray distribution and local pixel value.Experiments show that the proposed method can automatically de-termine the appropriate differential order,and can significantly improve visual effect.Experiments also show that the image en-hancement effect is close to or better than that of the optimal differential order,and the contrast of enhanced image is higher than that of the best order.关键词
图像增强/分数阶微分/自适应/韦伯-费希纳定律/恰可感知差异Key words
image enhancement/fractional differential/adaptive filtering/Weber-Fechner’s law/just noticeable diffe-rence分类
信息技术与安全科学引用本文复制引用
陈庆利,黄果,秦洪英..数字图像的分数阶微分自适应增强[J].计算机应用研究,2015,(5):1597-1600,4.基金项目
国家自然科学基金资助项目（61201438）；四川省教育厅资助项目（13ZB0104，13ZB0105，13TD0014）；乐山师范学院资助项目（Z1272）；乐山市科技局资助项目 （）
