电子学报Issue(4)：809-814,6.DOI:10.3969/j.issn.0372-2112.2014.04.029
小生境演化算法下的 WDCT 图像压缩方法
WDCT Image Compression Based on Niching Evolutionary Algorithm
摘要
Abstract
In order to select the frequency warping parameter in WDCT image compression ,this paper presents a new algo-rithm-WDCT image compression algorithm based on niching evolutionary algorithm (NEAWDCT) .With the global optimization of niching evolutionary algorithm ,it is combined with WDCT image compression algorithm to select the optimal parameter adaptively . To improve the convergence speed ,the coding methods and evolutionary operators are designed according to the parameter charac-teristics .The energy of image signal ordinarily is distributed in the part with lower frequency ,therefore population initialized by some numbers in certain interval .The initial population can improve the convergence speed and maintain the population diversity . The experiments show that the new algorithm (NEAWDCT) can improve the peak signal to noise ratio effectively .关键词
图像压缩/卷曲离散余弦变换/频率卷曲参数/小生境演化算法Key words
image compression/WDCT/frequency warping parameter/niching evolutionary algorithm分类
信息技术与安全科学引用本文复制引用
李康顺,韦蕴珊,张文生..小生境演化算法下的 WDCT 图像压缩方法[J].电子学报,2014,(4):809-814,6.基金项目
国家自然科学基金（No ．70971043）；广东省科技攻关项目（No ．2012A020602037）；江西省教育厅科学技术研究项目 （）
