文章目錄

• • 20191022
  • 20200523 第一次使用，修改了代碼內容
  • • 使用方法
    • 修改過的代碼

20191022

引用文章：啊哈~發表第一篇博客，voc格式的標注數據轉換為yolo格式的標注數據

import xml.etree.ElementTree as ET import pickle import os from os import listdir, getcwd from os.path import join#classes = ["aeroplane", "bicycle", "bird", "boat", "bottle", "bus", "car", "cat", "chair", "cow", "diningtable", "dog", "horse", "motorbike", "person", "pottedplant", "sheep", "sofa", "train", "tvmonitor"] #為了獲得cls iddef convert(size, box):dw = 1./(size[0])dh = 1./(size[1])x = (box[0] + box[1])/2.0 - 1y = (box[2] + box[3])/2.0 - 1w = box[1] - box[0]h = box[3] - box[2]x = x*dww = w*dwy = y*dhh = h*dhreturn (x,y,w,h)def convert_annotation(image_id):in_file = open('labels/%s.xml'%(image_id))out_file = open('labelsyolo/%s.txt'%(image_id), 'w')tree=ET.parse(in_file)root = tree.getroot()size = root.find('size')w = int(size.find('width').text)h = int(size.find('height').text)for obj in root.iter('object'):difficult = obj.find('difficult').textcls = obj.find('name').textif cls=='you':cls=0else:cls=1xmlbox = obj.find('bndbox')b = (float(xmlbox.find('xmin').text), float(xmlbox.find('xmax').text), float(xmlbox.find('ymin').text), float(xmlbox.find('ymax').text))bb = convert((w,h), b)out_file.write(str(cls) + " " + " ".join([str(a) for a in bb]) + '\n')wd = getcwd()b=0 list_file = os.listdir('labels') for file in list_file:f=file.replace('.xml','')convert_annotation(f)b=b+1 print(b)

代碼還未檢驗過、、

20200523 第一次使用，修改了代碼內容

今天用labelImg標注數據的時候，發現自己不小心把標注格式標成xml格式了，這個轉換代碼終于有用武之地了。。

自己把代碼修改了一下，，主要涉及兩方面，

1、標注類默認為0
2、轉換后標注數字默認保存6位小數

使用方法

在代碼.py文件目錄創建兩個文件夾，一個是labels，還有一個是labelsyolo，將xml格式標注放進labels文件夾，運行代碼，轉換格式后的yolo標注就被生成在labelsyolo文件夾里了

如圖：


運行代碼轉換后：

修改過的代碼

# -*- coding: utf-8 -*- """ @File : xml2yolo.py @Time : 2020/5/23 17:11 @Author : Dontla @Email : sxana@qq.com @Software: PyCharm """ import xml.etree.ElementTree as ET import pickle import os from os import listdir, getcwd from os.path import join# classes = ["aeroplane", "bicycle", "bird", "boat", "bottle", "bus", "car", "cat", "chair", "cow", "diningtable", "dog", "horse", "motorbike", "person", "pottedplant", "sheep", "sofa", "train", "tvmonitor"] #為了獲得cls iddef convert(size, box):dw = 1. / (size[0])dh = 1. / (size[1])x = (box[0] + box[1]) / 2.0 - 1y = (box[2] + box[3]) / 2.0 - 1w = box[1] - box[0]h = box[3] - box[2]x = x * dww = w * dwy = y * dhh = h * dhreturn (x, y, w, h)def convert_annotation(image_id):in_file = open('labels/%s.xml' % (image_id))out_file = open('labelsyolo/%s.txt' % (image_id), 'w')tree = ET.parse(in_file)root = tree.getroot()size = root.find('size')w = int(size.find('width').text)h = int(size.find('height').text)for obj in root.iter('object'):difficult = obj.find('difficult').textcls = obj.find('name').textif cls == 'you':cls = 0else:# Dontla 20200523# origin：cls = 1cls = 0xmlbox = obj.find('bndbox')b = (float(xmlbox.find('xmin').text), float(xmlbox.find('xmax').text), float(xmlbox.find('ymin').text),float(xmlbox.find('ymax').text))bb = convert((w, h), b)# Dontla 20200523# origin：out_file.write(str(cls) + " " + " ".join([str(a) for a in bb]) + '\n')out_file.write(str(cls) + " " + " ".join([str('{:6f}'.format(a)) for a in bb]) + '\n')wd = getcwd()b = 0 list_file = os.listdir('labels') for file in list_file:f = file.replace('.xml', '')convert_annotation(f)b = b + 1 print(b)

處于邊緣的標注框轉換后是否會越界，還未檢驗過、、

總結

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