计算机应用与软件2016，Vol.33Issue(3)：206-209,221,5.DOI:10.3969/j.issn.1000-386x.2016.03.047
一种新的 NSCT 域图像增强算法
A NEW NSCT DOMAIN IMAGE ENHANCEMENT ALGORITHM
摘要
Abstract
Part of the images collected in actual application has low contrast degree and blurry edge details.Aiming at this problem,we proposed an image enhancement algorithm which combines the NSCT-based multiscale Retinex algorithm with nonlinear gain function.It uses the improved multiscale Retinex algorithm to process the low-frequency sub-band coefficients so as to improve the dynamic range of image greyscale and to meliorate the brightness uniformity of image.The method of nonlinear gain function and Bayesian shrinkage threshold combi-nation is adopted to process the coefficients of each high-frequency sub-band,which suppresses image noise while enhancing image texture de-tails.Experimental result showed that the algorithm could effectively enhance the contrast degree and definition of the image,boost up image details information,these led to noticeable improvement in visual quality.关键词
图像增强/非下采样Contourlet变换/多尺度Retinex法/非线性增益函数Key words
Image enhancement/Nonsubsampled/Contourlet transform (NSCT)/Multiscale Retinex algorithm Nonlinear gain function分类
信息技术与安全科学引用本文复制引用
全永奇,邓家先,寇计萍,霍荣..一种新的 NSCT 域图像增强算法[J].计算机应用与软件,2016,33(3):206-209,221,5.基金项目
海南省自然科学基金项目（613155）；海南省科技兴海专项资金项目（XH201311）。 （）
