NVF

The HVS model is based on the computation of the noise visibility function ( NVF) and embed at the texture and edge region stronger embedded watermarks.

模型基于噪声可见性函数（NVF）的计算来决定水印嵌入强度，使水印更多的嵌入到图像的纹理和边缘区域。

This paper presents a watermarking capacity analysis method based on the content of wavelet subbands by using Watson quantization matrix and noise visibility function ( NVF).

提出了一种基于小波子带的内容，利用Watson量化矩阵和噪声可见性函数对水印的嵌入功率进行自适应限定的水印容量分析方法。

Poly ( N-vinylformamide) was synthesized with N-vinylformamide ( NVF) and K2S2O8 as initiator, and characterized by Fourier Transform Infrared Spectrum and X-ray Photoelectron Spectroscopy.

以K2S2O8为引发剂由N-乙烯基甲酰胺（NVF）合成了聚N-乙烯基甲酰胺，并用红外光谱仪和X-射线光电子能谱仪对产物进行了表征。

The N vinyl formamide ( NVF) is the functional vinyl compound.

N乙烯甲酰胺（NVF）是受到人们注目的功能性乙烯化合物，近年国外已有生产。

The cationic copolymers of NVF-DADMAC were synthesized by aqueous solution polymerization from N-vinylformamide ( NVF) and Diallyldimethylammonium chloride ( DADMAC).

以N-乙烯基甲酰胺（NVF）和二甲基二烯丙基氯化铵（DADMAC）为原料，通过水溶液聚合法合成了NVF-DADMAC阳离子共聚物。

Through the copolymerization of N-vinylformaind ( NVF) and N, N-dimethylacrylamide ( DMAM), the process of the copolymerization of different molar ratios was studied.

用N-乙烯基甲酰胺与N，N-二甲基丙烯酰胺进行不同摩尔配比的共聚反应，分析研究不同摩尔配比的共聚反应过程。

Secondly, the independent component analysis ( ICA) and the noise visibility function ( NVF) are introduced. So a algorithm based on noise visibility function and the independent component analysis of steganography was proposed.

其次，介绍了独立分量分析（ICA）和噪声可见性函数（NVF），在此基础上提出了一种基于噪声可见性函数和独立分量分析的数字密写算法。