%?
%???Copyright?（C）?2016??Starsky?Wong?
%?
%???Note:?The?SIFT?algorithm?is?patented?in?the?United?States?and?cannot?be
%???used?in?commercial?products?without?a?license?from?the?University?of
%???British?Columbia.??For?more?information?refer?to?the?file?LICENSE
%???that?accompanied?this?distribution.

function?[feat_index]?=?addOriFeatures（ddata_indexfeat_indexddatahistnori_peak_ratio）
%?Function:?Add?good?orientation?for?keypoints
global?features;
global?init_sigma;
global?intvls;
omax?=?dominantOri（histn）;
for?i?=?1:n
????if?（i==1）
????????????l?=?n;
????????????r?=?2;
????elseif?（i==n）
????????l?=?n-1;
????????r?=?1;
????else
????????l?=?i-1;
????????r?=?i+1;
????end
????if?（?hist（i）?>?hist（l）?&&?hist（i）?>?hist（r）?&&?hist（i）?>=?ori_peak_ratio*omax?）
????????bin?=?i?+?interp_hist_peak（hist（l）hist（i）hist（r））;
????????if?（?bin?-1?<=?0?）
????????????bin?=?bin?+?n;
????????%?i?think?it‘s?theoretically?impossible
????????elseif?（?bin?-1?>?n?）
????????????bin?=?bin?-?n;
????????????disp（‘###################what?the?fuck?###################‘）;
????????end
????????accu_intvl?=?ddata.intvl?+?ddata.x_hat（3）;
????????features（feat_index）.ddata_index?=?ddata_index;
????????%?first?octave?is?double?size
????????features（feat_index）.x?=?（ddata.x?+?ddata.x_hat（1））*2^（ddata.octv-2）;
????????features（feat_index）.y?=?（ddata.y?+?ddata.x_hat（2））*2^（ddata.octv-2）;
????????features（feat_index）.scl?=?init_sigma?*?power（2ddata.octv-2?+?（accu_intvl-1）/intvls）;????????
????????features（feat_index）.ori?=?（bin-1）/n*2*pi?-?pi;
????????feat_index?=?feat_index?+?1;
????end
end
end

function?[omax]?=?dominantOri（histn）
????omax?=?hist（1）;
????for?i?=?2:n
????????if（hist（i）?>?omax）
????????????omax?=?hist（i）;
????????end
????end
end

function?[position]?=?interp_hist_peak（lcr）
????position?=?0.5*（l-r）/（l-2*c+r）;
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1909??2018-05-30?20:40??第二次\addOriFeatures.m

?????文件????????732??2018-05-30?20:39??第二次\calcGrad.m

?????文件????????480??2018-05-30?20:25??第二次\drawFeatures.m

?????文件???????1543??2018-05-30?20:26??第二次\drawMatched.m

?????文件????????598??2018-05-30?20:28??第二次\gaussian.m

?????文件???????8024??2018-05-30?20:22??第二次\getFeatures.m

?????文件????????551??2018-05-30?20:46??第二次\hist2Descr.m

?????文件???????1274??2018-05-30?20:43??第二次\interpHistEntry.m

?????文件???????2371??2018-05-30?20:31??第二次\interpLocation.m

?????文件????????796??2018-05-30?20:35??第二次\isEdgeLike.m

?????文件????????920??2018-05-30?20:24??第二次\match.m

?????文件???????3715??2018-06-20?19:29??第二次\match_ransac.m

?????文件????????860??2018-05-30?20:37??第二次\oriHist.m

?????文件????????333??2018-06-20?19:05??第二次\Run.m

?????文件??????26390??2018-05-30?20:32??第二次\s.jpg

?????文件????????747??2018-05-30?20:39??第二次\smoothOriHist.m

?????文件??????28680??2018-05-30?20:33??第二次\t1.jpg

?????文件??????25856??2018-05-30?20:33??第二次\t2.jpg

?????文件??????18839??2018-05-30?20:33??第二次\t3.jpg

?????文件??????53261??2018-06-20?18:35??第二次\wxy1.jpg

?????文件??????75677??2018-06-20?18:35??第二次\wxy2.jpg

?????文件??????38094??2018-05-30?18:40??第二次\{51ML[$8TLOZLS5ZH）]9W%J.png

?????文件????1004733??2018-05-30?20:57??第二次\第二次.docx

?????目錄??????????0??2018-07-21?12:39??第二次

-----------?---------??----------?-----??----

??????????????1296383????????????????????24