AI检测代码解析 importtorchimportnumpyasnpdefdct_ii(x):N=x.size(0)factor=np.pi/N# 创建DCT变换矩阵dct_matrix=torch.empty(N,N)forkinrange(N):forninrange(N):dct_matrix[k,n]=np.cos(factor*(n+0.5)*k)# 进行DCT变换result=dct_matrix @ x result*=np.sqrt(2/N)result[0]*=1/np.sqrt(...
Discrete cosine transform type, specified as a positive integer scalar from 1 to 4. See Discrete Cosine Transform for the definitions of the different types of DCT. Data Types: single | double Output Arguments collapse all y— Discrete cosine transform vector | matrix | N-D array Discrete cosi...
D— DCT matrix numeric matrix DCT matrix, returned as a numeric matrix of sizen-by-n. Data Types:double Tips If you have ann-by-nimage,A, thenD*Ais the DCT of the columns ofAandD'*Ais the inverse DCT of the columns ofA.
从证明可以看出系数的存在是为了让DCT matrix的行向量构成orthonormal basis。不考虑系数的化只是orthogonal的。 MATLAB实验 比较DCT和DFT对真实信号的“能量聚集”对于一个16个采样点的信号,分别用DCT和DFT重建。重建时分别使用从低频开始的5,10,15个点。效果如下: 使用频谱中5个点 使用频谱中10个点 使用频谱中15个...
尼得科(Nidec)推出DCT用电机(双离合变速器用电机),是车用电控执行机构无刷电机,广泛应用于DCT(双离合变速器)的档位选择和切换、驱动低扭油泵系统、电子驻车系统、扭矩矢量分配系统、分动器动力传
% Form intermediate even-symmetric matrix y = zeros(2*n,m);y(1:n,= aa;y(n+1:2*n,= ...
Dynamic Programming Question, selecting 1s in a 0-1 matrix such that each row and column contain exactly one 1 Doctrine_Connection_Mysql_Exception when saving a row with Doctrine WP_Query order by usermeta value Render Partial within a Partial MVC ...
matrixG=zeros(64,64); matrixB=zeros(64,64); %二进制个数 num = 1; %将置乱的图像存入三个64*64的矩阵中,方便后续进行的加密算法(隐藏进入彩色图片R\G\B的三个二维矩阵) for row = 1:h for column = 1:w for pos = 8:-1:1 if(num<=64*64) ...
The MVs of middle time blocks in Pk+n were coidered as the uniform MVs of the 4DUs in Pk+n, then MC were calculated with these MVs between Pk+n and F′ After prediction, the residual coefficients (D) were traformed by 4D-MDCT (T), quantified by 4D matrix quantization (Q), ...
格式:D=dctmtx(n)说明:D=dctmtx(n)返回一个nn的DCT变换矩阵,输出矩阵D为double类型。4.图像去噪的实现简介MATLAB是矩阵实验室(Matrix Laboratory)的简称,在数学类科技应用应用广泛。MATLAB可以进行矩阵运算、绘制函数和数据、实现算法、创建用户界面、连接其他编程语言的程序等,主要应用于工程计算、控制设计、信号处理...