sustaining_gazes/matlab_version/face_validation/WarpRegion.m

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2016-04-28 21:40:36 +02:00
function [ mapX, mapY ] = WarpRegion( xmin, ymin, mask, triX, coeffs )
%WARPREGION Summary of this function goes here
% Detailed explanation goes here
%%
[h, w] = size(mask);
mapX = zeros(size(mask));
mapY = zeros(size(mask));
ys = [1:h]' * ones(1, w) + ymin - 1;
xs = ([1:w]' * ones(1, h))' + xmin - 1;
for t=0:size(coeffs,1)-1
trimap = triX == t;
a = coeffs(t+1,:);
xo = a(1) + a(2) * xs + a(3) * ys;
mapX(trimap) = xo(trimap);
yo = a(4) + a(5) * xs + a(6) * ys;
mapY(trimap) = yo(trimap);
end
mapX(~mask) = -1;
mapY(~mask) = -1;
%%
% [h, w] = size(mask);
% mapX_2 = zeros(size(mask));
% mapY_2 = zeros(size(mask));
%
% ys = [1:h]' * ones(1, w) + ymin - 1;
% xs = ([1:w]' * ones(1, h))' + xmin - 1;
%
% ys = ys(:);
% xs = xs(:);
%
% xos = coeffs(1,:) + bsxfun(@times, coeffs(2,:), xs) + bsxfun(@times, coeffs(3,:), ys);
% yos = coeffs(4,:) + bsxfun(@times, coeffs(5,:), xs) + bsxfun(@times, coeffs(6,:), ys);
%
% maps = repmat(trimap(:),1, size(coeffs,1));
% maps = repmat
end