VOC2012数据集提取自己需要的类的图片和对应的xml标签

根据需要修改路径和自己需要的类即可。

import os
import os.path
import shutil
  
fileDir_ann = r'/home/somnus/tttt/VOC2012/Annotations/'
fileDir_img = r'/home/somnus/tttt/VOC2012/JPEGImages/'
 
#存放包含需要的类的图片
saveDir_img = r'/home/somnus/tttt/VOC2012/JPEGImages_ssd/'
        
if not os.path.exists(saveDir_img):
    os.mkdir(saveDir_img)
 

names = locals()
 
for files in os.walk(fileDir_ann):
    #遍历Annotations中的所有文件
    for file in files[2]:
        print file + "-->start!"
 
        #存放包含需要的类的图片对应的xml文件
        saveDir_ann = r'/home/somnus/tttt/VOC2012/Annotations_ssd/'
 
        if not os.path.exists(saveDir_ann):
            os.mkdir(saveDir_ann)
        fp = open(fileDir_ann + file)       
        saveDir_ann = saveDir_ann + file
        fp_w = open(saveDir_ann, 'w')
        classes = ['aeroplane','bicycle','bird','boat','bottle','bus','car','cat','chair','cow','diningtable',
                   'dog','horse','motorbike','pottedplant','sheep','sofa','train','tvmonitor','person']
 
        lines = fp.readlines()
 
        #记录所有的	<object>
的位置
        ind_start = []
 
        #记录所有的	</object>
的位置
        ind_end = []
 
        lines_id_start = lines[:]
        lines_id_end = lines[:]
 
        while "	<object>
" in lines_id_start:
            a = lines_id_start.index("	<object>
")
            ind_start.append(a)
            lines_id_start[a] = "delete"
 
        while "	</object>
" in lines_id_end:
            b = lines_id_end.index("	</object>
")
            ind_end.append(b)
            lines_id_end[b] = "delete"
 
        for k in range(0,len(ind_start)):
            for j in range(0,len(classes)):
                if classes[j] in lines[ind_start[k]+1]:
                    a = ind_start[k]
                    names['block%d'%k] = lines[a:ind_end[k]+1]
                    break
        #需要的类
        classes1 = '		<name>person</name>
'
 
        string_start = lines[0:ind_start[0]]
        string_end = lines[ind_end[-1] + 1:]
 
        a = 0
        for k in range(0,len(ind_start)):
            if classes1 in names['block%d'%k]:
                a += 1
                string_start += names['block%d'%k]
 
        string_start += string_end
        for c in range(0,len(string_start)):
            fp_w.write(string_start[c])
        fp_w.close()
 
        if a == 0:
            os.remove(saveDir_ann)
        else:
            name_img = fileDir_img + os.path.splitext(file)[0] + ".jpg"
            shutil.copy(name_img,saveDir_img)
        fp.close()

参考

https://blog.csdn.net/samylee/article/details/61919677