python对目标检测数据集xml文件操作

淩亂°似流年 2022-04-25 09:32 425阅读 0赞

博主在制作目标检测数据集时，需要将之前的标签进行替换，将person替换为rider，使用python批量处理xml格式文件如下：

import os, sys
    import glob
    from xml.etree import ElementTree as ET
    #批量读取Annotations下的xml文件
    #per=ET.parse(r'C:\Users\rockhuang\Desktop\Annotations\000003.xml')
    xml_dir=r'C:\Users\rockhuang\Desktop\Annotations'
    xml_list= glob.glob(xml_dir + '/*.xml')
    for xml in xml_list:
        print(xml)
        per=ET.parse(xml)
        p=per.findall('/object')
    
        for oneper in p:  #找出person节点
            child=oneper.getchildren()[0] #找出person节点的子节点
            if child.text=='person':
                child.text='rider'
            
    
        per.write(xml)
        print(child.tag,':',child.text)

修改之前的xml文件为：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODYzMjI0Ng_size_16_color_FFFFFF_t_70]  
修改之后:  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODYzMjI0Ng_size_16_color_FFFFFF_t_70 1]  
需要将 xmin,ymin,xmax,ymax坐标和width，height统一缩小

# coding=utf-8
    # 读xml文件中的一个rect
    import xml.etree.ElementTree as ET
    import os, sys
    import glob
    
    
    xml_dir=r'C:\Users\rockhuang\Desktop\rider_xml'
    xml_list= glob.glob(xml_dir + '\*.xml')
    for xml in xml_list:
        tree = ET.parse(xml)
        root = tree.getroot()
    
        for size in root.findall('size'):
            for width in size.iter('width'):
                width.text=str(round(int(width.text)/4))
               # print(width.text)
            for height in size.iter('height'):
                height.text=str(round(int(height.text)/4))
               # print(height.text)
        for ob in root.findall('object'):
            for bndbox in ob.iter('bndbox'):
                # for l in bndbox:
                # print(l.text)
                for xmin in bndbox.iter('xmin'):
                    xmin.text= str(round(int(xmin.text)/4))
                for ymin in bndbox.iter('ymin'):
                    ymin.text =str(round(int(ymin.text)/4))
                for xmax in bndbox.iter('xmax'):
                    xmax.text =str(round(int(xmax.text)/4)) 
                for ymax in bndbox.iter('ymax'):
                    ymax.text = str(round(int(ymax.text)/4))
                #print(xmin.text,ymin.text,xmax.text,ymax.text)
        tree.write(xml)

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODYzMjI0Ng_size_16_color_FFFFFF_t_70]: /images/20220125/4e8ec760f06f4e6c91f3adcc4fff1b32.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zODYzMjI0Ng_size_16_color_FFFFFF_t_70 1]: /images/20220125/d86a96a9be564186aab9c5a9eaa69e51.png