partshiftz0.m

来自「基于matlab写的对人体的分割程序」· M 代码 · 共 40 行

function Y = partshiftZ0(D,len,wid)
%D = partshiftZ0(D,len,wid)
%Pads the matrix with zeros
%Assumes D is 0-degree aligned

if nargin < 3,
    wid = 0;
end


%if nargin > 3,
    %Circularly shift the array so that the u,v, aligns up
    %ie, if respIm(:,:,1,parent) has the canonical alignment, the most
    %likely kid orientation should be shifted to be respIm(:,:,1,kid)
%    [uu,vv] = pol2cart(([0:stepo:360+stepo]+90) * pi/180,1);
%    [dummy,I] = max(uu*u + vv*v);
%    D = circshift(D,[0 0 -(I-1)]);
%end 

[imy, imx, imo] = size(D);
stepo = 360/imo; %stepo = 15 degrees
%[ux,vx] = pol2cart(([stepo:stepo:360]+180) * pi/180,wid); %Width offset
%[uy,vy] = pol2cart(([stepo:stepo:360]+90) * pi/180,len); %Length offset
[ux,vx] = pol2cart(([stepo:stepo:360]+180-stepo+180) * pi/180,wid); %Width offset
[uy,vy] = pol2cart(([stepo:stepo:360]+90-stepo+180) * pi/180,len); %Length offset


vx = -vx;
vy = -vy;
xvec = round(ux+uy);
yvec = round(vx+vy);
maxv = round(max(abs([xvec yvec])));
Y = zeros([imy imx imo]);;
D = padarray(D,[maxv maxv 0],'both');

for i = 1:imo,
    Y(:,:,i) = D(maxv+yvec(i)+1:imy+maxv+yvec(i),maxv+xvec(i)+1:imx+maxv+xvec(i),i);
end