vbb格式的annotations转化成txt格式

 
    function read_vbb()
% this function is to convert vbb file to txt
%by dachao at 2015.11.27
a = [0 1 2 3 4 5];
vPath = 'C:\Users\hp\Desktop\annotations\';
outpath = 'C:\Users\hp\Desktop\annotations\caltechAnnotations';
if ~isdir(outpath)
    mkdir(outpath);
end
disp('Begin to extract annotations from vbb....')
for ii = 1:length(a)
    vName = ['set0',num2str(a(ii))];
    vbbpath = [vPath vName];
    str = dir(vbbpath);
    for k = 3:numel(str)
        finalpath = [vbbpath,'\',str(k).name];
        disp(finalpath);
        A = vbb( 'vbbLoad', finalpath);
        Path = [outpath,'\',vName];
        if ~isdir(Path)
            mkdir(Path);
        end
        st = str(k).name;
        p = findstr(st,'.');
        st = st(1,1:p(1)-1);
        fnm = [st,'.txt'];
        c=fopen([Path,'\',fnm],'w');
        for i = 1:A.nFrame
            iframe = A.objLists(1,i);
            iframe_data = iframe{1,1};
            n1length = length(iframe_data);
            for  j = 1:n1length
                iframe_dataj = iframe_data(j);
                if iframe_dataj.pos(1) ~= 0  %pos  posv
                    fprintf(c,'%d %f %f %f %f\n', i, iframe_dataj.pos(1),...
                     iframe_dataj.pos(2),iframe_dataj.pos(3),iframe_dataj.pos(4));
                end
            end
        end
    end
fclose(c);
end
disp('Done................')
end