% for POSITIVE PRINT OF IMAGE
% scales a real matrix to [0,255] range,
% and places a border of all black (zeros) around the outside.
% the dimension is increased by 2 each way
%
% Y = border(X);       % black border all around
%                      % so if image is mostly white, you can see its region of support
%
% Y = border(X,2);     % double thickness border all around
%
% Y = border(X,3,4);   % 3 rows of zeros, 4 cols of zeros;
%                      % looks nice on a 3by4 image (eg. TV screen size)

function Y = dummy(X,thicknessrow,thicknesscol)

if nargin == 2
  thicknesscol = thicknessrow;
end%if
if nargin == 1
  thicknesscol = 1;
  thicknessrow = 1;
end%if

[M N] = size(X);
rowpad = zeros(thicknessrow,N);
Y = [rowpad;X;rowpad];

colpad = zeros(M+2*thicknessrow,thicknesscol);
Y = [colpad Y colpad];