File size: 2,410 Bytes
9913017 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | function colorTest()
% colorTest() creates a test image showing the color encoding scheme
% According to the c++ source code of Daniel Scharstein
% Contact: schar@middlebury.edu
% Author: Deqing Sun, Department of Computer Science, Brown University
% Contact: dqsun@cs.brown.edu
% $Date: 2007-10-31 20:22:10 (Wed, 31 Oct 2006) $
% Copyright 2007, Deqing Sun.
%
% All Rights Reserved
%
% Permission to use, copy, modify, and distribute this software and its
% documentation for any purpose other than its incorporation into a
% commercial product is hereby granted without fee, provided that the
% above copyright notice appear in all copies and that both that
% copyright notice and this permission notice appear in supporting
% documentation, and that the name of the author and Brown University not be used in
% advertising or publicity pertaining to distribution of the software
% without specific, written prior permission.
%
% THE AUTHOR AND BROWN UNIVERSITY DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
% INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR ANY
% PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR OR BROWN UNIVERSITY BE LIABLE FOR
% ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
%% test color pattern of Daniel's c++ code
truerange = 1;
height = 151;
width = 151;
range = truerange * 1.04;
s2 = round(height/2);
[x y] = meshgrid(1:width, 1:height);
u = x*range/s2 - range;
v = y*range/s2 - range;
img = computeColor(u/truerange, v/truerange);
img(s2,:,:) = 0;
img(:,s2,:) = 0;
figure;
imshow(img);
title('test color pattern');
pause; close;
% test read and write flow
F(:,:,1) = u;
F(:,:,2) = v;
writeFlowFile(F, 'colorTest.flo');
F2 = readFlowFile('colorTest.flo');
u2 = F2(:,:,1);
v2 = F2(:,:,2);
img2 = computeColor(u2/truerange, v2/truerange);
img2(s2,:,:) = 0;
img2(:,s2,:) = 0;
figure; imshow(img2);
title('saved and reloaded test color pattern');
pause; close;
% color encoding scheme for optical flow
img = computeColor(u/range/sqrt(2), v/range/sqrt(2));
img(s2,:,:) = 0;
img(:,s2,:) = 0;
figure;
imshow(img);
title('optical flow color encoding scheme');
pause; close;
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