图片标签格式的转换：TXT转为XML，PNG转为JPG格式

图片标签格式的转换：TXT转为XML，PNG转为JPG格式

本人在做科研的时候总是要把一些图片转为不同格式，因此记录一下转换的代码。

1.标签格式的转换：TXT–>XML

from xml.dom.minidom import Document
import os
import cv2


def makexml(txtPath, xmlPath, picPath):  # 读取txt路径，xml保存路径，数据集图片所在路径
    dict = {'0': "person",  # 字典对类型进行转换
            '1': "dump_truck",
            '2': "bicycle",
            '3': "motorbike",
            '4': "ambulance",
            '5': "car",
            '6': "bus",
            '7': "truck"}  # 图像类别
    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
        for i in txtList:
            oneline = i.strip().split(" ")

            folder = xmlBuilder.createElement("folder")  # folder标签，创建节点
            folderContent = xmlBuilder.createTextNode("VOC2007")
            folder.appendChild(folderContent)
            annotation.appendChild(folder)

            filename = xmlBuilder.createElement("filename")  # filename标签
            filenameContent = xmlBuilder.createTextNode(name[0:-4] + ".png")
            filename.appendChild(filenameContent)
            annotation.appendChild(filename)

            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)
            height = xmlBuilder.createElement("height")  # size子标签height
            heightContent = xmlBuilder.createTextNode(str(Pheight))
            height.appendChild(heightContent)
            size.appendChild(height)
            depth = xmlBuilder.createElement("depth")  # size子标签depth
            depthContent = xmlBuilder.createTextNode(str(Pdepth))
            depth.appendChild(depthContent)
            size.appendChild(depth)
            annotation.appendChild(size)

            object = xmlBuilder.createElement("object")
            picname = xmlBuilder.createElement("name")
            nameContent = xmlBuilder.createTextNode(dict[oneline[0]])
            picname.appendChild(nameContent)
            object.appendChild(picname)
            pose = xmlBuilder.createElement("pose")
            poseContent = xmlBuilder.createTextNode("Unspecified")
            pose.appendChild(poseContent)
            object.appendChild(pose)
            truncated = xmlBuilder.createElement("truncated")
            truncatedContent = xmlBuilder.createTextNode("0")
            truncated.appendChild(truncatedContent)
            object.appendChild(truncated)
            difficult = xmlBuilder.createElement("difficult")
            difficultContent = xmlBuilder.createTextNode("0")
            difficult.appendChild(difficultContent)
            object.appendChild(difficult)
            bndbox = xmlBuilder.createElement("bndbox")
            xmin = xmlBuilder.createElement("xmin")
            mathData = int(((float(oneline[1])) * Pwidth + 1) - (float(oneline[3])) * 0.5 * Pwidth)
            xminContent = xmlBuilder.createTextNode(str(mathData))
            xmin.appendChild(xminContent)
            bndbox.appendChild(xmin)
            ymin = xmlBuilder.createElement("ymin")
            mathData = int(((float(oneline[2])) * Pheight + 1) - (float(oneline[4])) * 0.5 * Pheight)
            yminContent = xmlBuilder.createTextNode(str(mathData))
            ymin.appendChild(yminContent)
            bndbox.appendChild(ymin)
            xmax = xmlBuilder.createElement("xmax")
            mathData = int(((float(oneline[1])) * Pwidth + 1) + (float(oneline[3])) * 0.5 * Pwidth)
            xmaxContent = xmlBuilder.createTextNode(str(mathData))
            xmax.appendChild(xmaxContent)
            bndbox.appendChild(xmax)
            ymax = xmlBuilder.createElement("ymax")
            mathData = int(((float(oneline[2])) * Pheight + 1) + (float(oneline[4])) * 0.5 * Pheight)
            ymaxContent = xmlBuilder.createTextNode(str(mathData))
            ymax.appendChild(ymaxContent)
            bndbox.appendChild(ymax)
            object.appendChild(bndbox)

            annotation.appendChild(object)

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


makexml("E:/data/vid/txt/", "E:/data/vid/xml/", "/data/vid/JPG/")#三个路径分别为存放txt标签文件路径，保存转换后的xml路径，标签对应图片所在路径

2.图片格式的转换：PNG–>JPG

import os
from PIL import Image

dirname_read="E:/data/vid/png/"  # 图片png格式的存放路径
dirname_write="E:/data/vid/jpg/" # 转换为jpg格式的存放路径
names=os.listdir(dirname_read)
count=0
for name in names:
    img=Image.open(dirname_read+name)
    name=name.split(".")
    if name[-1] == "png":
        name[-1] = "jpg"
        name = str.join(".", name)
        to_save_path = dirname_write + name
        img.save(to_save_path)
        count+=1
        print(to_save_path, "------conut：",count)
    else:
        continue

在此，感谢提供参考的CSDN博主们，由于时间有点久，忘记具体参考的是哪位大神的资料，因此不附链接了，再次表示感谢，希望以上内容对大家有所帮助！