maxtrix4_2_0to4_4_4.m

用matlab写的仿真H.263标准的程序

function Matrix3D = Maxtrix4_2_0to4_4_4(Y,U,V)
%把4：2：0 YUV图像转换成4:4:4 MxNx3图像

msg = nargchk(3,3,nargin);

if ~(isempty(msg)) %检查输入参数是否为3个
    disp(msg)
    return ;
end

[M,N] = size(Y);

Matrix3D(:,:,1) = Y(:,:);
for i = 1:M/2
    for j = 1:N/2
Matrix3D(2*i - 1,2*j -1,2) = U(i,j);
Matrix3D(2*i,2*j -1,2) = U(i,j);
Matrix3D(2*i - 1,2*j,2) = U(i,j);
Matrix3D(2*i,2*j ,2) = U(i,j);

Matrix3D(2*i - 1,2*j -1,3) = V(i,j);
Matrix3D(2*i,2*j -1,3) = V(i,j);
Matrix3D(2*i - 1,2*j,3) = V(i,j);
Matrix3D(2*i,2*j ,3) = V(i,j);
    end
end