function?[points]?=?log_Blob（imgo_nb_blobs）
????%?功能：提取LoG斑點(diǎn)
????%?輸入：?
????%??????img?–輸入的圖像
????%???????o_nb_blobs?-需要檢測(cè)的斑點(diǎn)區(qū)域的數(shù)量
????%?輸出：
????%???????points?-檢測(cè)出的斑點(diǎn)
????%?參考文獻(xiàn)：
????%?Lindeberg?T.?Feature?Detection?with?Automatic?Scale?Selection
????%?IEEE?Transactions?Pattern?Analysis?Machine?Intelligence?1998?30?
????%?77-116
????
????%?輸入圖像
????img?=?double（img（::1））;
????????
????%?設(shè)定檢測(cè)到斑點(diǎn)的數(shù)量
????if?nargin==1
????????nb_blobs?=?120;
????else
????????nb_blobs?=?o_nb_blobs;
????end
????
????%?設(shè)定LoG參數(shù)
????sigma_begin?=?2;
????sigma_end???=?15;
????sigma_step??=?1;
????sigma_array?=?sigma_begin:sigma_step:sigma_end;
????sigma_nb????=?numel（sigma_array）;
????????
????%?變量
????img_height??=?size（img1）;
????img_width???=?size（img2）;
????????
????%?計(jì)算尺度規(guī)范化高斯拉普拉斯算子
????snlo?=?zeros（img_heightimg_widthsigma_nb）;
????for?i=1:sigma_nb
????????sigma???????=?sigma_array（i）;

snlo（::i）?=?sigma*sigma*imfilter（imgfspecial（‘log‘?floor（6*sigma+1）?sigma）‘replicate‘）;

????end
????????
????%?搜索局部極值
????snlo_dil?????????????=?imdilate（snloones（333））;
????blob_candidate_index?=?find（snlo==snlo_dil）;
????blob_candidate_value?=?snlo（blob_candidate_index）;
????[tmpindex]??????????=?sort（blob_candidate_value‘descend‘）;
????
blob_index???????????=?blob_candidate_index（?index（1:min（nb_blobsnumel（index）））?）;

[ligcolsca]????????=?ind2sub（[img_heightimg_widthsigma_nb]blob_index）;

????points???????????????=?[ligcol3*reshape（sigma_array（sca）[size（lig1）1]）];
????
end

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????1636??2012-02-05?19:59??log_Blob.m

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

?????????????????1636????????????????????1