%?下面mAP的具體計算過程請參閱：http://yongyuan.name/blog/evaluation-of-information-retrieval.html

clear;clear?all;
addpath（‘./database/‘）;

queryFile?=?‘./queryImgs.txt‘;
classesFile?=?‘./databaseClasses.txt‘;
load?feat4096Norml.mat

N?=?9;?%?如果用于論文中，把這個值設(shè)為你所用數(shù)據(jù)庫的大小

fid?=?fopen（queryFile‘rt‘）;
queryImgs?=?textscan（fid?‘%s‘）;
fclose（fid）;

fid?=?fopen（classesFile‘rt‘）;
classesAndNum?=?textscan（fid?‘%s?%d‘）;
fclose（fid）;

for?i?=?1:length（classesAndNum{1?1}）
????classes{i1}?=?classesAndNum{1?1}{i1}（1:3）;
end

[numImgd]?=?size（feat_norm）;
querysNum?=?length（queryImgs{1?1}）;

ap?=?zeros（querysNum1）;

for?i?=1:querysNum
????queryName?=?queryImgs{1?1}{i?1};
????queryClass?=?queryName（1:3）;
????
????[rowcol]=ind2sub（size（imgNamList）strmatch（queryNameimgNamList‘exact‘））;
????queryFeat?=?feat_norm（row?:）;
????
????[row1col1]=ind2sub（size（classesAndNum{1?1}）strmatch（queryClassclasses‘exact‘））;
????queryClassNum?=?double（classesAndNum{1?2}（row11））;
????
????%dist?=?distMat（queryFeatfeat_norm）;
????%dist?=?dist‘;
????%[~?rank]?=?sort（dist?‘a(chǎn)scend‘）;
????
????dist?=?zeros（numImg?1）;
????for?j?=?1:numImg
????????VecTemp?=?feat_norm（j?:）;
????????dist（j）?=?queryFeat*VecTemp‘;
????end
????[~?rank]?=?sort（dist?‘descend‘）;
????
????similarTerm?=?0;
????
????precision?=?zeros（N1）;
????
????for?k?=?1:N
????????topkClass?=?imgNamList{rank（k?1）?1}（1:3）;????????
????????if?strcmp（queryClasstopkClass）==1;
????????????similarTerm?=?similarTerm+1;
????????????precision（k1）?=?similarTerm/k;
????????end
????end
????
????
????for?k?=?1:N
????????topkClass?=?imgNamList{rank（k?1）?1}（1:3）;?
????????%?use?for?configure
????????subplot（43k）;
????????im?=?imread（imgNamList{rank（k?1）?1}）;
????????imshow（im）;
????end
????

????ap（i1）?=?sum（precision）/queryClassNum;
????
????fprintf（‘%s?ap?is?%f?\n‘queryNameap（i1））;
????
end

mAP?=?sum（ap）/querysNum;
fprintf（‘mAP?is?%f?\n‘mAP）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\
?????文件???????????6??2017-10-07?10:56??CNNImageSearch\.gitignore
?????文件????????5048??2017-10-07?10:56??CNNImageSearch\README.md
?????文件????????1982??2017-10-07?10:56??CNNImageSearch\compute_MAP.m
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\database\
?????文件???????25120??2017-10-07?10:56??CNNImageSearch\database\001_accordion_image_0001.jpg
?????文件???????18640??2017-10-07?10:56??CNNImageSearch\database\001_accordion_image_0002.jpg
?????文件???????25284??2017-10-07?10:56??CNNImageSearch\database\001_accordion_image_0003.jpg
?????文件????????4945??2017-10-07?10:56??CNNImageSearch\database\002_anchor_image_0001.jpg
?????文件???????12210??2017-10-07?10:56??CNNImageSearch\database\002_anchor_image_0002.jpg
?????文件???????23032??2017-10-07?10:56??CNNImageSearch\database\002_anchor_image_0003.jpg
?????文件???????10067??2017-10-07?10:56??CNNImageSearch\database\003_ant_image_0001.jpg
?????文件???????10756??2017-10-07?10:56??CNNImageSearch\database\003_ant_image_0002.jpg
?????文件???????22111??2017-10-07?10:56??CNNImageSearch\database\003_ant_image_0003.jpg
?????文件????????8173??2017-10-07?10:56??CNNImageSearch\database\1982.jpg
?????文件??????????39??2017-10-07?10:56??CNNImageSearch\databaseClasses.txt
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\databaseClassified\
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\databaseClassified\accordion\
?????文件???????25120??2017-10-07?10:56??CNNImageSearch\databaseClassified\accordion\image_0001.jpg
?????文件???????18640??2017-10-07?10:56??CNNImageSearch\databaseClassified\accordion\image_0002.jpg
?????文件???????25284??2017-10-07?10:56??CNNImageSearch\databaseClassified\accordion\image_0003.jpg
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\databaseClassified\anchor\
?????文件????????4945??2017-10-07?10:56??CNNImageSearch\databaseClassified\anchor\image_0001.jpg
?????文件???????12210??2017-10-07?10:56??CNNImageSearch\databaseClassified\anchor\image_0002.jpg
?????文件???????23032??2017-10-07?10:56??CNNImageSearch\databaseClassified\anchor\image_0003.jpg
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\databaseClassified\ant\
?????文件???????10067??2017-10-07?10:56??CNNImageSearch\databaseClassified\ant\image_0001.jpg
?????文件???????10756??2017-10-07?10:56??CNNImageSearch\databaseClassified\ant\image_0002.jpg
?????文件???????22111??2017-10-07?10:56??CNNImageSearch\databaseClassified\ant\image_0003.jpg
?????文件????????1964??2017-10-07?10:56??CNNImageSearch\extractCNN.m
?????目錄???????????0??2018-06-29?14:23??CNNImageSearch\matconvnet-1.0-beta18\
............此處省略342個文件信息