计算机工程2011，Vol.37Issue(11)：67-68,73,3.DOI:10.3969/j.issn.1000.3842.2011.11.023
二维离散分数余弦变换的改进形式
Improved Type of Two Dimensional Discrete Fractional Cosine Transform
摘要
Abstract
It expands transform nuclear of one dimensional Discrete Cosine Transform(DCT) into the two dimensional fractional type, gets two dimensional discrete fractional cosine transform of Pei type.Then an improved type of two dimensional discrete fractional cosine transform is purposed which is a weighted combination of the integer-order cosine transforms of the original signal.It analyzes the period connection of the two types transformations based on feature value and feature vector of DCT.Numerical value simulation result indicates that the two types of transformation can get the same results, and it can be applied in image processing, digital watermark technology.关键词
傅里叶变换/离散余弦变换/特征向量/二维空间Key words
Fourier Transform(FT)/ Discrete Cosine Transform(DCT)/ feature vector/ two dimensional space分类
信息技术与安全科学引用本文复制引用
徐九南,鲁宇明,韩奎林..二维离散分数余弦变换的改进形式[J].计算机工程,2011,37(11):67-68,73,3.基金项目
航空科学基金资助项目(2008ZD56003) （2008ZD56003）
江西省教育厅科技基金资助项目(GJJ07178) （GJJ07178）
