YOLO格式的txt文件转换为VOC格式的xml文件

0.博主转换完格式后会有一行

<?xml version='1.0' encoding='utf-8'?>

处理方式如下：

1.YOLO格式的txt文件

图片中第一列为数据标签文件的类别的id

2.转换后的voc标签的xml文件

3. 首先将此代码复制到自己的python工程路径下

from xml.dom.minidom import Document
import os
import cv2
def makexml(txtPath, xmlPath, picPath):  # txt所在文件夹路径，xml文件保存路径，图片所在文件夹路径
    """此函数用于将yolo格式txt标注文件转换为voc格式xml标注文件

    在自己的标注图片文件夹下建三个子文件夹，分别命名为picture、txt、xml
    """
    # 本例中的标签有5个类，按照自己的类别进行更改
    dic = {'0': "dog",  # 创建字典用来对类型进行转换
           '1': "person",  # 此处的字典要与自己的classes.txt文件中的类对应，且顺序要一致
           '2': "car",
           '3': "bus",
           '4': "bicycle"
           }
    files = os.listdir(txtPath)
    for i, name in enumerate(files):
        xmlBuilder = Document()
        annotation = xmlBuilder.createElement("annotation")  # 创建annotation标签
        xmlBuilder.appendChild(annotation)
        txtFile = open(txtPath + name)
        txtList = txtFile.readlines()
        img = cv2.imread(picPath + name[0:-4] + ".jpg")
        Pheight, Pwidth, Pdepth = img.shape

        folder = xmlBuilder.createElement("folder")  # folder标签
        foldercontent = xmlBuilder.createTextNode("my_person")
        folder.appendChild(foldercontent)
        annotation.appendChild(folder)  # folder标签结束

        filename = xmlBuilder.createElement("filename")  # filename标签
        filenamecontent = xmlBuilder.createTextNode(name[0:-4] + ".jpg")
        filename.appendChild(filenamecontent)
        annotation.appendChild(filename)  # filename标签结束

        path = xmlBuilder.createElement("path")  # path标签
        pathcontent = xmlBuilder.createTextNode("G:\darknet\My_Persons\my_person\\"+name[0:-4] + ".jpg")
        path.appendChild(pathcontent)
        annotation.appendChild(path)  # path标签结束

        source = xmlBuilder.createElement("source")  # source标签
        database = xmlBuilder.createElement("database")  # source子标签database
        databasecontent = xmlBuilder.createTextNode("Unknown")
        database.appendChild(databasecontent)
        source.appendChild(database)  # source子标签database结束
        annotation.appendChild(source)  # source标签结束

        size = xmlBuilder.createElement("size")  # size标签
        width = xmlBuilder.createElement("width")  # size子标签width
        widthcontent = xmlBuilder.createTextNode(str(Pwidth))
        width.appendChild(widthcontent)
        size.appendChild(width)  # size子标签width结束

        height = xmlBuilder.createElement("height")  # size子标签height
        heightcontent = xmlBuilder.createTextNode(str(Pheight))
        height.appendChild(heightcontent)
        size.appendChild(height)  # size子标签height结束

        depth = xmlBuilder.createElement("depth")  # size子标签depth
        depthcontent = xmlBuilder.createTextNode(str(Pdepth))
        depth.appendChild(depthcontent)
        size.appendChild(depth)  # size子标签depth结束

        annotation.appendChild(size)  # size标签结束

        for j in txtList:
            oneline = j.strip().split(" ")
            object = xmlBuilder.createElement("object")  # object 标签
            picname = xmlBuilder.createElement("name")  # name标签
            namecontent = xmlBuilder.createTextNode(dic[oneline[0]])
            picname.appendChild(namecontent)
            object.appendChild(picname)  # name标签结束

            pose = xmlBuilder.createElement("pose")  # pose标签
            posecontent = xmlBuilder.createTextNode("Unspecified")
            pose.appendChild(posecontent)
            object.appendChild(pose)  # pose标签结束

            truncated = xmlBuilder.createElement("truncated")  # truncated标签
            truncatedContent = xmlBuilder.createTextNode("0")
            truncated.appendChild(truncatedContent)
            object.appendChild(truncated)  # truncated标签结束

            difficult = xmlBuilder.createElement("difficult")  # difficult标签
            difficultcontent = xmlBuilder.createTextNode("0")
            difficult.appendChild(difficultcontent)
            object.appendChild(difficult)  # difficult标签结束

            bndbox = xmlBuilder.createElement("bndbox")  # bndbox标签
            xmin = xmlBuilder.createElement("xmin")  # xmin标签
            mathData = int(((float(oneline[1])) * Pwidth ) - (float(oneline[3])) * 0.5 * Pwidth)
            xminContent = xmlBuilder.createTextNode(str(mathData))
            xmin.appendChild(xminContent)
            bndbox.appendChild(xmin)  # xmin标签结束

            ymin = xmlBuilder.createElement("ymin")  # ymin标签
            mathData = int(((float(oneline[2])) * Pheight) - (float(oneline[4])) * 0.5 * Pheight)
            yminContent = xmlBuilder.createTextNode(str(mathData))
            ymin.appendChild(yminContent)
            bndbox.appendChild(ymin)  # ymin标签结束

            xmax = xmlBuilder.createElement("xmax")  # xmax标签
            mathData = int(((float(oneline[1])) * Pwidth ) + (float(oneline[3])) * 0.5 * Pwidth)
            xmaxContent = xmlBuilder.createTextNode(str(mathData))
            xmax.appendChild(xmaxContent)
            bndbox.appendChild(xmax)  # xmax标签结束

            ymax = xmlBuilder.createElement("ymax")  # ymax标签
            mathData = int(((float(oneline[2])) * Pheight + 1) + (float(oneline[4])) * 0.5 * Pheight)
            ymaxContent = xmlBuilder.createTextNode(str(mathData))
            ymax.appendChild(ymaxContent)
            bndbox.appendChild(ymax)  # ymax标签结束

            object.appendChild(bndbox)  # bndbox标签结束

            annotation.appendChild(object)  # object标签结束

        f = open(xmlPath + name[0:-4] + ".xml", 'w')
        xmlBuilder.writexml(f, indent='', newl='\n', addindent='\t', encoding='utf-8')
        f.close()

# 注意下面的路径要换成自己文件夹的路径，否则会报错
makexml("G:/darknet/My_Persons/txt/", "G:/darknet/My_Persons/xml3/",
        "G:/darknet/My_Persons/picture/")  # yolo标签的txt格式所在文件夹路径，voc标签的xml格式的文件保存路径，图片所在文件夹路径

4.找到如下代码

在上面的代码快的，大概118行，找到如下代码

按住ctrl键，鼠标点击红色方框中的方法

5.进入到该方法的源码中

该方法的源码是minidom.py，按照第四步就可进入如下的源码

    def writexml(self, writer, indent="", addindent="", newl="", encoding=None):
        if encoding is None:
            writer.write(''+newl)
        else:
            writer.write('%s' % (
                encoding, newl))
        for node in self.childNodes:
            node.writexml(writer, indent, addindent, newl)

6.找到第五步中的方法，大概在1789行中，注释掉里面的if else语句

    # def writexml(self, writer, indent="", addindent="", newl="", encoding=None):
    #     if encoding is None:
    #         writer.write(''+newl)
    #     else:
    #         writer.write('%s' % (
    #             encoding, newl))
       for node in self.childNodes:
             node.writexml(writer, indent, addindent, newl)

注释完后如上图所示

7.最后运行第三步中的代码

转换完成后，打开保存.xml文件的文件夹

结果如上图所示，转换完毕，谢谢。
借鉴：https://blog.csdn.net/weixin_43720657/article/details/107361479