File size: 2,527 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 | function writeFlowFile(img, filename)
% writeFlowFile writes a 2-band image IMG into flow file FILENAME
% 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 15:36:40 (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.
TAG_STRING = 'PIEH'; % use this when WRITING the file
% sanity check
if isempty(filename) == 1
error('writeFlowFile: empty filename');
end;
idx = findstr(filename, '.');
idx = idx(end); % in case './xxx/xxx.flo'
if length(filename(idx:end)) == 1
error('writeFlowFile: extension required in filename %s', filename);
end;
if strcmp(filename(idx:end), '.flo') ~= 1
error('writeFlowFile: filename %s should have extension ''.flo''', filename);
end;
[height width nBands] = size(img);
if nBands ~= 2
error('writeFlowFile: image must have two bands');
end;
fid = fopen(filename, 'w');
if (fid < 0)
error('writeFlowFile: could not open %s', filename);
end;
% write the header
fwrite(fid, TAG_STRING);
fwrite(fid, width, 'int32');
fwrite(fid, height, 'int32');
% arrange into matrix form
tmp = zeros(height, width*nBands);
tmp(:, (1:width)*nBands-1) = img(:,:,1);
tmp(:, (1:width)*nBands) = squeeze(img(:,:,2));
tmp = tmp';
fwrite(fid, tmp, 'float32');
fclose(fid);
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