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ongoing/ASIFT_tests/demo_ASIFT_src/demo_ASIFT.m Executable file
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%*-------------------demo_ASIFT MATLAB interface -------------------------*/
%
% *************************************************************************
% NOTE: The ASIFT SOFTWARE ./demo_ASIFT IS STANDALONE AND CAN BE EXECUTED
% WITHOUT MATLAB.
% *************************************************************************
%
% Detect corresponding points in two images with the ASIFT method.
% Copyright, Jean-Michel Morel, Guoshen Yu, 2008.
% Please report bugs and/or send comments to Guoshen Yu yu@cmap.polytechnique.fr
%
% Reference: J.M. Morel and G.Yu, ASIFT: A New Framework for Fully Affine Invariant Image
% Comparison, SIAM Journal on Imaging Sciences, vol. 2, issue 2, pp. 438-469, 2009.
% Reference: ASIFT online demo (You can try ASIFT with your own images online.)
% http://www.ipol.im/pub/algo/my_affine_sift/
%
% 2010.08.17
% ---------------------------------------------------------------------------*/
function demo_ASIFT(file_img1, file_img2, imgOutVert, imgOutHori, matchings, keys1, keys2, flag_resize)
if (nargin == 8)
if (isnumeric(flag_resize) && (flag_resize == 0))
flag_resize = 0;
else
flag_resize = 1;
end
elseif (nargin == 7)
flag_resize = 1;
else
disp('*******************************************************************************');
disp('*************************** ASIFT image matching ****************************');
disp('*******************************************************************************');
disp('Usage: ./demo_ASIFT imgIn1 imgIn2 imgOutVert.png imgOutHori.png');
disp(' matchings.txt keys1.txt keys2.txt [Resize option: 0/1]');
disp('- imgIn1, imgIn2: input images (in most standard formats).');
disp('- imgOutVert.png, imgOutHori.png: output images (vertical/horizontal concatenated,');
disp(' in PNG format.) The detected matchings are connected by write lines.');
disp('- matchings.txt: coordinates of matched points (col1, row1, col2, row2).');
disp('- keys1.txt keys2.txt: ASIFT keypoints of the two images.')
disp('- [optional 0/1]. 1: input images resize to 800x600 (default). 0: no resize.');
disp('*******************************************************************************');
disp('********************* Jean-Michel Morel, Guoshen Yu, 2010 ********************');
disp('*******************************************************************************');
assert(false);
end
imgIn1 = imread(file_img1);
imgIn2 = imread(file_img2);
% convert the image to png format
file_img1_png = 'tmpASIFTinput1.png';
file_img2_png = 'tmpASIFTinput2.png';
imwrite(imgIn1, file_img1_png, 'png');
imwrite(imgIn2, file_img2_png, 'png');
% ASIFT command
command_ASIFT = './demo_ASIFT';
command_ASIFT = [command_ASIFT ' ' file_img1_png ' ' file_img2_png ' ' ...
imgOutVert ' ' imgOutHori ' ' matchings ' ' keys1 ' ' keys2];
if (flag_resize == 0)
command_ASIFT = [command_ASIFT ' 0'];
end
% get the number of processors
% Mac
if (ismac == 1)
[s, w] = unix('sysctl -n hw.ncpu');
num_CPUs = str2num(w);
% set the maximum OpenMP threads to the number of processors
set_threads = sprintf('export OMP_NUM_THREADS=%d;', num_CPUs);
command = [set_threads ' ' command_ASIFT];
% Unix
elseif (isunix == 1)
[s, w] = unix('grep processor /proc/cpuinfo | wc -l');
num_CPUs = str2num(w);
% set the maximum OpenMP threads to the number of processors
set_threads = sprintf('export OMP_NUM_THREADS=%d;', num_CPUs);
command = [set_threads ' ' command_ASIFT];
% Windows
elseif (ispc == 1)
[s, w] = dos('set NUMBER_OF_PROCESSORS');
num_CPUs = sscanf(w, '%*21c%d', [1, Inf]);
% set the maximum OpenMP threads to the number of processors
setenv('OMP_NUM_THREADS', num2str(num_CPUs));
command = command_ASIFT;
else
error('Unrecognized operating system. The operating system should be Windows, Linux/Unix, or Mac OS.');
end
status = system(command);