from lxml import etree
import cv2
# 读取 xml 文件信息,并返回字典形式
def parse_xml_to_dict(xml):
if len(xml) == 0: # 遍历到底层,直接返回 tag对应的信息
return {xml.tag: xml.text}
result = {}
for child in xml:
child_result = parse_xml_to_dict(child) # 递归遍历标签信息
if child.tag != 'object':
result[child.tag] = child_result[child.tag]
else:
if child.tag not in result: # 因为object可能有多个,所以需要放入列表里
result[child.tag] = []
result[child.tag].append(child_result[child.tag])
return {xml.tag: result}
# xml 标注文件的可视化
def xmlShow(img, xml, save=True):
image = cv2.imread(img)
with open(xml, encoding='gb18030', errors='ignore') as fid: # 防止出现非法字符报错
xml_str = fid.read()
xml = etree.fromstring(xml_str)
data = parse_xml_to_dict(xml)["annotation"] # 读取 xml文件信息
ob = [] # 存放目标信息
for i in data['object']: # 提取检测框
name = str(i['name']) # 检测的目标类别
bbox = i['bndbox']
xmin = int(bbox['xmin'])
ymin = int(bbox['ymin'])
xmax = int(bbox['xmax'])
ymax = int(bbox['ymax'])
tmp = [name, xmin, ymin, xmax, ymax] # 单个检测框
ob.append(tmp)
# 绘制检测框
for name, x1, y1, x2, y2 in ob:
cv2.rectangle(image, (x1, y1), (x2, y2), color=(255, 0, 0), thickness=2) # 绘制矩形框
cv2.putText(image, name, (x1, y1 - 10), fontFace=cv2.FONT_HERSHEY_SIMPLEX,
fontScale=0.5, thickness=1, color=(0, 0, 255))
# 保存图像
if save:
cv2.imwrite('result.png', image)
# # 展示图像
# cv2.imshow('test', image)
# cv2.waitKey()
# cv2.destroyAllWindows()
if __name__ == "__main__":
import os
import random
img_path = './data/train/images/' # 传入图片
image = [os.path.join(img_path, i) for i in os.listdir(img_path)]
r = random.randint(0, len(image) - 1) # 生成随机索引
image_path = image[r]
labels_path = image_path.replace('images', 'labels') # 自动获取对应的 xml 标注文件
labels_path = labels_path.replace('.jpg', '.xml')
xmlShow(img=image_path, xml=labels_path, save=True)
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温馨提示
项目包含:5种猫品种检测【VOC标注格式,包含训练集和验证集、类别json文件以及可视化脚本】,数据保存按照文件夹保存,经测试,可直接用作目标检测数据集,无需额外处理。 图像分辨率为640*640的大分辨率RGB图片,数据集为猫检测。标注的边界框完整,每张图像均有数个目标。 【数据集介绍】5类别:阿比西尼亚、英短、孟加拉、孟买等 【数据总大小】138 MB 【数据集详情】data目录下分为两个目录,训练数据和验证数据,每个目录下各有两个子文件夹。images存放数据图片,labels目录存放标注文件。训练集共3180张图片和3180个xml解释文件。验证集共119张图片和119个xml解释文件 【json文件】5 类别的json字典文件 为了方便查看数据,提供了可视化py文件,随机传入一张图片即可绘制边界框,并且保存在当前目录。脚本无需更改,可以直接运行得到标注后的图像
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