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英语翻译
翻译个八九不离十就行!追加100分
2.4 自适应的位置确定 为了提高彩色水印图像的透明性与鲁棒性,本文充分结合人眼的视觉掩蔽特性,给出了数字水印嵌入位置的自适应确定方法(即小波系数选取方法)。具体步骤如下:
（1）计算小波系数X的亮度因子Y，其中X表示小波分解层次,Z表示高频子带的方向,x,y表示小波系数位置。
（2）选择视觉重要系数用于水印嵌入。亮度因子A为关键字,对所有子带内的小波系数进行降序排序,选择前3N个小波系数X作为数字水印嵌入位置。
2.5 自适应量化间隔的确定 不可感知性是数字水印要求的一个基本特性，因而水印算法必须与人眼的敏感性相适应。利用人类视觉系统的特点来确定水印的嵌入强度可以在保证水印不可见的基础上有效地提高其鲁棒性。为了使量化调制自适应于载体图像,我们根据选择的小波系数集的均值a和方差b来确定量化间隔。设被选择的小波系数集的权值a,其中d和a分别为s和m的称重参数。求出h的最大值a和最小值b，就可以利用m=a得到小波系数集的量化间隔e,这里n供选择的小波系数集的数量,x和d分别是用户设定的最大和最小量化间隔。方差a均值d被用来调整量化间隔以使嵌入的水印更好地适应于载体图像。参数s用来控制背景的量化称重，a用来控制结构的量化称重。
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2.4 to determine the location of adaptive order to enhance the color watermark image of transparency and robustness of this article fully integrated human visual masking properties, gives the location of the digital watermark embedded in the adaptive method (that is, select the method of wavelet coefficients). Concrete steps are as follows:
(1) of the wavelet coefficients calculated brightness of the X-Y, which said that the X-level wavelet decomposition, Z said that the high-frequency sub-band direction, x, y said that the location of the wavelet coefficients.
(2) to choose an important factor for visual embedded watermark. A brightness factor for keywords, all sub-band of wavelet coefficients in descending order, select a pre-3N wavelet coefficients X as a digital watermark embedding location.
2.5 adaptive quantization intervals to determine the perception of non-digital watermarking is a basic requirement of the characteristics of the algorithm must therefore Watermark and the sensitivity of the human eye to adapt. Use of the human visual system to determine the characteristics of the embedded watermark strength can ensure the invisible watermark on the basis of effectively improve its robustness. In order to quantify the adaptive modulation carrier in the image, we choose according to the wavelet-coefficient of variance and a mean b to determine the interval to quantify. Has been set up to choose the wavelet coefficients of the right to set the value of a, in which d and a and s were weighing the m parameters. H calculated minimum and a maximum value of b, will be able to use m = a wavelet coefficients to be set to quantify the interval e, where n alternative set of the number of wavelet coefficients, x and d are the biggest users and Quantify the smallest interval. D mean a variance was used to adjust the spacing to allow quantification of the embedded watermark to better adapt to the carrier in the image. S parameters used to control the context of the quantitative weight, a quantitative structure used to control weight.
