【钟表识别】基于计算机视觉实现钟表时间识别含Matlab源码

function [time_clock]= read(filepath)     I = imread(filepath);         [edges,center,maxxy,minxy] = edges_center(I);      [arrowslines,longest,center] = getarrows(I,edges,center,maxxy,minxy);      if isempty(arrowslines)       info = imfinfo(filepath);       center(1) = info.Width/2;       center(2) = info.Height/2;       maxxy = [info.Width info.Height];       minxy = [0 0];       [arrowslines,longest,center] = getarrows(I,edges,center,maxxy,minxy);   end   finallines = struct('point1',{},'point2',{});   if length(arrowslines) == 1       newlongest = arrowslines(1);       finallines(1) = arrowslines(1);       finallines(2) = arrowslines(1);   end   max_len = 0;   j=1;   if length(arrowslines) == 3       for i = 1 : length(arrowslines)           if ~isequal(arrowslines(i),longest)               finallines(j) = arrowslines(i);               len = norm(finallines(j).point1 - finallines(j).point2);               if ( len > max_len)                   max_len = len;                   newlongest = arrowslines(i);               end               j = j+1;           end       end   elseif length(arrowslines) == 2       finallines = arrowslines;       newlongest = longest;   end   if isequal(finallines(1),newlongest)       vminute = finallines(1).point2 - finallines(1).point1;       vhour = finallines(2).point2 - finallines(2).point1;   else       vhour = finallines(1).point2 - finallines(1).point1;       vminute = finallines(2).point2 - finallines(2).point1;   end   vminute = [vminute 0];   vhour = [vhour 0];   v2 = [0 1 0];   angle1 =  atan2d(norm(cross(vminute,v2)),dot(vminute,v2));   angle2 =  atan2d(norm(cross(vhour,v2)),dot(vhour,v2));      if vminute(1) > 0        angle1 = 360 - angle1;   end       if vhour(1) > 0       angle2 = 360 -angle2;   end   minute =roundn(angle1/6,0);   hour = floor(angle2/30);      if minute >= 10    time_clock = [num2str(hour) , ':', num2str(minute)];   else    time_clock = [num2str(hour) , ':0', num2str(minute)];   end