sustaining_gazes/matlab_version/face_validation/DeepLearnToolbox/util/visualize.m

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2016-04-28 19:40:36 +00:00
function r=visualize(X, mm, s1, s2)
%FROM RBMLIB http://code.google.com/p/matrbm/
%Visualize weights X. If the function is called as a void method,
%it does the plotting. But if the function is assigned to a variable
%outside of this code, the formed image is returned instead.
if ~exist('mm','var')
mm = [min(X(:)) max(X(:))];
end
if ~exist('s1','var')
s1 = 0;
end
if ~exist('s2','var')
s2 = 0;
end
[D,N]= size(X);
s=sqrt(D);
if s==floor(s) || (s1 ~=0 && s2 ~=0)
if (s1 ==0 || s2 ==0)
s1 = s; s2 = s;
end
%its a square, so data is probably an image
num=ceil(sqrt(N));
a=mm(2)*ones(num*s2+num-1,num*s1+num-1);
x=0;
y=0;
for i=1:N
im = reshape(X(:,i),s1,s2)';
a(x*s2+1+x : x*s2+s2+x, y*s1+1+y : y*s1+s1+y)=im;
x=x+1;
if(x>=num)
x=0;
y=y+1;
end
end
d=true;
else
%there is not much we can do
a=X;
end
%return the image, or plot the image
if nargout==1
r=a;
else
imagesc(a, [mm(1) mm(2)]);
axis equal
colormap gray
end