translateimage.m

超声图像实时消噪实验程序

    function r = translateImage( f, di, dj )
    % Translation of an image
    N = size( f, 1 );
    M = size( f, 2 );
    if di>0
        iind = [(di+1):N, N*ones(1,di)];
    elseif di<0
        iind = [ ones(1,-di), 1:(N+di) ];
    else
        iind = 1:N;
    end
    if dj>0
        jind = [(dj+1):M, M*ones(1,dj)];
    elseif dj<0
        jind = [ ones(1,-dj), 1:(M+dj) ];
    else
        jind = 1:M;
    end
    r = f( iind, jind );