... 变换的因子分解 factorization of a transformation 变换尺度因子 transformation scale factor 因子变换 factor transformation ...
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通过对图像做仿jpeg流程的处理，在DCT变换的直流系数上嵌入水印，对于各种常用的JPEG压缩量化因子，可以得到良好的水印嵌入效果。
It embeds the watermark bits on the DC of the DCT transform coefficients, for most JPEG quality factor, the method is proved to be robust and effective.
首先，综述了图像域中分形编码的特性，然后导出在离散余弦变换(简称DCT)域中仿射变换的伸缩因子和偏移量的对应公式。
We firstly overview the properties of fractal coding in image domain, then we derive the corresponding formula of scaling factor and offset of affine transform in DCT domain.
本文采用二阶z变换对转录因子结合位点序列进行建模。
This paper models transcription factor binding sites (TFBS) using two-step Z transform.
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