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- Choose the video frames with small skewness,brightness space into blocks before the discrete cosine transform,embed the middle frequency coefficients into watermarking. 选择偏斜度很小的视频帧,对亮度空间分块后实施离散余弦变换,在中频系数中嵌入水印。
- Firstly, the watermarking data are coded and replaced according to BCH.And then, the coded data and synchronization codes are embedded into the candidate middle frequency coefficients in DCT domain. 该方法先将水印信号进行BCH编码并按密钥置换,然后将编码后的数据和同步码依次嵌入到DCT块的候选中频系数中,并通过同步码来实现水印的快速随机检测。
- The algorithm makes the middle frequency coefficient of the host information into sequence of . 将DWT变换域的中频系数分解为一个序偶序列;通过序偶中a和b的大小关系来表示0或者1。
- Research on Blind Watermarking Embedding Algorithm with Replacing Middle Frequency Coefficients in DCT Domain 置换DCT域中频系数的盲水印嵌入算法研究
- middle frequency coefficients 中频系数
- And the high frequency coefficients are encoded with SPECK algorithm. 对高频部分采用原始SPECK算法。
- Frequency coefficients for each series are shown in the catalogue or specifications. 各个系列的频率系数已在产品目录或规格书中列出。
- The algorithm combines the quadtree decomposition of image, with making use of the characteristic of the lowest frequency coefficients in DWT domain to construct non-watermark. 该算法结合图像的四叉树分解原理,利用图像小波域低频系数的特征来构造零水印。
- Considering robustness of watermark, we choice low frequency Coefficients of DWT(Discrete Wavelet Transformation) to embed black and white watermark. 出于鲁棒性考虑,我们对图像进行小波变换,选择在小波域的低频系数中嵌入二值水印。
- The Heat-treatment reguires quenching + middle frequency inducing tempering(tension). 它的热处理制度为淬火+中频感应张力回火。
- The deposition-deoxidization behavior of de-oxidizer in middle frequency furnace was expounded. 阐述中频感应电炉脱氧剂采取插入沉淀脱氧反应的特性。
- Y-doped zinc oxide(ZYO)thin films were prepared by middle frequency alternative magnetron sputtering on glass substrates with ZYO ceramic targets. 利用中频磁控溅射法,溅射氧化锌钇(ZYO)陶瓷靶材,在玻璃基底上制备ZYO透明导电薄膜。
- First, frequency-spectral analysts for output signals of inertia elements is given to decide the scale of wavelet multiresolution analysis and the measures for their high frequency coefficients. 首先对惯性元件输出信号进行频谱分析,确定相应的多分辨分析尺度以及不同尺度下对高频系数采取的相应措施。
- Exploiting the excellent properties of the wavelet transform and some characteristics of Human Visual System(HVS),watermark is embedded into the middle frequency suband images of the original image in DWT domain. 利用人类视觉系统 (HVS)的特性 ,定义了视觉掩蔽函数 ,实现了水印在原始宿主图像小波域中的自适应嵌入 ,从而兼顾了水印的不可见性和鲁棒性。
- The characteristic values are the filter's middle frequencies and their bandwidths. 滤波器有中间频率和带宽这两个特征值。
- HWH middle frequence inverter,controller and PQS process monitoring system for resistance welding. 德国HWH公司中频电阻焊变频机,控制器,PQS 智能焊接质量检测系统。
- The company owns advanced middle frequency furnace, compound centrifugal casting machine, precise and complete metal cutting equipment and advanced and modern quality measurement and control means. 本公司拥有先进的中频电炉、复合式离心浇铸和精密齐全的金属切削设备以及先进的现代化质量测控手段,生产的合金轧辊具有辊面度高、强度大、耐磨性能好、耐热裂、抗剥落等特点。
- Finally a bit of the watermark is embedded by adjusting the polarity between a high frequency coefficient and the output value of the model. 最后通过调整高频系数与模型输出值之间的大小关系来嵌入水印信息.
- Hybrid sampling coding with multiple-description is proposed which chooses its local sampling scheme according to DCT high frequency coefficient. 在此基础上,提出了根据DCT高频系数来选择局部采样方式的编码方法-混合采样多描述编码。
- By studying JPEG compression and HVS theory, watermarking information is embedded in the DCT intermediate frequency coefficient part of the image. 通过对JPEG压缩以及人眼视觉系统理论的研究,确定了把水印信息嵌入到图像的离散余弦变换域的中频系数部分;