**1. imagenet ILSVRC2014_ID to ILSVRC2012_ID

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ILSVRC2014_ID又1860类，ILSVRC2012_ID 有1000类，1281167个训练图

matlab从ILSVRC2014_ID 选取ILSVRC2012_ID类别：

matlab代码

load('imagenet_filename.mat')  %s
load('meta_clsloc.mat') %synsets
for i = 1:1000
%    b = []
    a1000 = a(i,:);
    for ii = 1:1860
        b1860 = synsets(ii).WNID;
        if b1860 == a1000
            S(i) = synsets(ii);
        end
    end
end
% c=s(1000).wnid
% d= s(1).wnid
k = []
for iii = 1:1000
    k(iii) = S(iii).num_train_images;
end
sum(k)
save('imagenet_2012.mat','S')

按顺序排列

for wgb_ii = 1:1000
for wgb_i = 1:1000
  if S(wgb_i).ILSVRC2014_ID ==wgb_ii
       kkk(wgb_ii) = S(wgb_i);
  end
end 
end
synsets = kkk
save('imagenet_2012.mat','synsets')