查询词典 cosine function

A feature extraction and retrieval algorithm based on childblock partition and area division using discrete cosine transformation and singular value decomposition is proposed.

提出一种在子块分割和区域划分的基础上，利用离散余弦变换和奇异值分解对图像进行特征提取的检索算法。

All phase Walsh transform ; biorthogonal transform ; dual biorthogonal base vectors ; JPEG image compression algorithm ; discrete cosine transform; peak signal to noise ratio

全相位沃尔什变换；双正交变换；对偶双正交基向量； JPEG压缩编码算法；离散余弦变换；峰值信噪比

In the embedment of the information, the hiding algorithm of Discrete Cosine Transform based on modular arithmetic has been chosen in the frequency law.

在秘密信息的嵌入入程中，选择了频域法中的基于模运算的离散余弦变换隐藏算法，这样就增强了隐秘载体在传输入程中的安全性。

By the procedure, we first use the cosine values of the angle between view vector and normal vector on each vertex as the texture coordinates, through calculation of the dot product of the two vectors. The derivative of radial curvature on the model surface is used as the second pass texture mapping coordinates, by a calculation using Euler formula.

该方法首先通过模型顶点的视线向量和法线向量的点乘积计算其夹角的余弦值，作为第一步的纹理坐标进行映射；再通过欧拉公式计算径向曲率及其方向导数值，作为第二步映射的纹理坐标。

Circadian parameters were analysed by the cosine method, and by the F test to judge the statistics significance.

用余弦分析获取节律参数，并经振幅检验，分析是否存在昼夜节律。

First, the replacement of the traditional fast Fourier transformation with discrete cosine transformation in additive white Gaussian noise channel to set up OFDM system is analyzed and simulated in this article.

首先，在加性白高斯噪声信道中，本文分析和仿真了用离散余弦变换替代传统的快速傅立叶变换宋实现OFDM系统。

Four segment vector quantizers of the local cosine transform coefficients are employed, and Linde-Gray-Buzol algorithm is applied to design the codebooks.

对局部余弦变换系数采用分维矢量量化方法进行量化，码书设计采用LGB算法。

VC prepared by an image processing procedures : it can transform the image, including Fourier transform, Discrete Cosine Tr...

用VC编写的一个图像处理的程序：它可以实现图像的变换，包括傅立叶变换、离散余弦变换和沃什变换。

Fourier transform, discrete cosine transform, orthogonal transformation code.

傅立叶变换，离散余弦变换，正交变换的代码。

At present,the research of digital watermarking focused on discrete fourier transform domain, Discrete cosine transform domain, Discrete wavelet transform domain and others, but its robustness need to be improved.

目前，对于频域数字水印技术的研究主要集中于离散傅里叶变换域、离散余弦变换域和离散小波变换域等，但其鲁棒性能都有待提高。

I can not negligent, he should do what?

我不能不在意了，他要做什么呢？

It is very dangerous to swim in the river alone.

一个人到河里游泳是很危险的。