%?extracts?the?center?（cccr）?and?radius?of?the?largest?blob
function?[x2y2width_xwidth_ycccrflag]=extract（ImworkImbackindex）%fig1fig2fig3fig15index）
??
??x2?=?0;
??y2?=?0;
??width_x?=?0;
??width_y?=?0;
??cc?=?0;
??cr?=?0;
??flag?=?0;
??[MRMCDim]?=?size（Imback）;

??%?subtract?background?&?select?pixels?with?a?big?difference
??fore?=?zeros（MRMC）;??????????%image?subtracktion
??fore?=?（abs（Imwork（::1）-Imback（::1））?>?20）?...
?????|?（abs（Imwork（::2）?-?Imback（::2））?>?20）?...
?????|?（abs（Imwork（::3）?-?Imback（::3））?>?20）;??

??%?Morphology?Operation??erode?to?remove?small?noise
??%foremm?=?bwmorph（fore‘erode‘2）;?%2?time

??%?select?largest?object
??labeled?=?bwlabel（fore4）;
??stats?=?regionprops（labeled[‘basic‘]）;%basic?mohem?nist
??[NW]?=?size（stats）;
??if?N?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????638976??2005-03-14?13:59??kalman?tracking\SampleVideo.avi
?????文件????????8704??2009-06-29?09:11??kalman?tracking\Thumbs.db
?????文件????????1586??2009-06-28?21:06??kalman?tracking\extract.m
?????文件????????2597??2014-12-11?16:27??kalman?tracking\kalman.m
?????目錄???????????0??2009-06-29?09:59??kalman?tracking\