/usr/share/octave/site/m/vlfeat/toolbox/mser/vl_ertr.m is in octave-vlfeat 0.9.17+dfsg0-6build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | function f = vl_ertr(f) ;
% VL_ERTR Transpose exremal regions frames
% F = VL_ERTR(F) transposes the frames F as returned by VL_MSER(). This
% conversion is required as the VL_MSER algorithm considers the column
% index I as the frist image index, while according standard image
% convention the first coordinate is the abscissa X.
%
% See also: VL_MSER(), VL_HELP().
if size(f,1) ~= 5
error('F is not in the right format') ;
end
% adjust convention
f = f([2 1 5 4 3],:) ;
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