【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