A new digital image watermarking algorithm based on fractional cosine transform 一种基于分数余弦变换的数字图像水印算法
Discrete cosine transform 离散余弦变换
Digital image compression technology based on discrete cosine transform and realization based on matlab 实现地震数据的小波变换
Dct ( disperse cosine transform ) based on mpeg - 4 is fit for the compression algorithm of streaming media 基于mpeg - 4的dct压缩算法适合流媒体数据压缩。
The paper proposed the characteristics and inversion method of gravity anomalies spectrum using cosine transform 摘要提出利用余弦变换，研究规则体重力异常谱特征及反演方法。
Formulas of inversion and cosine transform spectrum of gravity anomaly of sphere , infinite horizontal cylinder , infinite and finite stretched staircase were deduced 推导出球体、无限长水平圆柱体、无限和有限延伸垂直台阶的重力异常余弦变换谱及反演表达式。
Data correlation coefficients were calculated and switch regions were analyzed by using two dimension discrete cosine transform ( dct ) in ray - space data compression 在光线空间的数据压缩中，计算了数据的相关系数，采用二维离散余弦变换( dct )进行了变换域分析。
The block - based discrete cosine transform ( bdct ) suffers from visible blocking artifacts between adjacent image blocks at low bit rates , which reduces the image visual quality 摘要块离散余弦变换在低比特率时其恢复图像的块边界上会出现明显可见的方块效应，从而降低了图像的视觉质量。
