将文件夹下的xml文件转换为txt到另一个文件,但是生成的txt文件是空的是为什么呢
xml文件内容是这样的
<annotation>
<folder>20160523</folder>
<filename>XRay20160523153057.bmp</filename>
<path>\\192.168.31.118\share\ImageLabel\20160523\XRay20160523153057.bmp</path>
<source>
<database>Unknown</database>
</source>
<size>
<width>1024</width>
<height>768</height>
<depth>3</depth>
</size>
<segmented>0</segmented>
<object>
<name>mobilephone</name>
<pose>Unspecified</pose>
<truncated>0</truncated>
<difficult>0</difficult>
<bndbox>
<xmin>268</xmin>
<ymin>384</ymin>
<xmax>340</xmax>
<ymax>434</ymax>
</bndbox>
</object>
<object>
<name>sword_middle</name>
<pose>Unspecified</pose>
<truncated>0</truncated>
<difficult>0</difficult>
<bndbox>
<xmin>291</xmin>
<ymin>405</ymin>
<xmax>393</xmax>
<ymax>472</ymax>
</bndbox>
</object>
<object>
<name>gun_mause</name>
<pose>Unspecified</pose>
<truncated>0</truncated>
<difficult>0</difficult>
<bndbox>
<xmin>332</xmin>
<ymin>352</ymin>
<xmax>442</xmax>
<ymax>414</ymax>
</bndbox>
</object>
</annotation>
import xml.etree.ElementTree as ET
import os
# 类别
CLASSES=["glassbottle","knife","middleknife","bigknife","gun","computer","mobile","bottle"]
# xml文件路径
#xml_input="D:\\temp\\yolov7-main\\data\\dataset_one\\labels\\train\\"
xml_input = "D:\\temp\\yolov7-main\\data\\dataset_one\\labels\\valid\\"
#txt_output="D:\\temp\\yolov7-main\\data\\dataset_one\\labels\\trainTXT\\"
txt_output = "D:\\temp\\yolov7-main\\data\\dataset_one\\labels\\validTXT"
def convert(size,box):
# 将bbox的左上角点,右下角点坐标的格式,转换为bbox中心点+bbox的W,H的格式,并进行归一化
dw=1./size[0]
dh=1./size[1]
x=(box[0]+box[1])/2.0
y=(box[2]+box[3])/2.0
w=box[1]-box[0]
h=box[3]-box[2]
x=x*dw
w=w*dw
y=y*dh
h=h*dh
return (x,y,w,h)
def convert_annotation(image_id):
# 把图像image_id的xml文件转换为目标检测的label文件(txt)
# 其中包含物体的类别cls,bbox的中心点坐标,以及bbox的W,H
# 并将四个物理量归一化
in_file=open(xml_input+image_id)
image_id=image_id.split(".")[0]
# out_file=open(txt_output+"txt/%s.txt"%(image_id),"w")
out_file = open(txt_output + "%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").text
obj_cls=obj.find("name").text
if obj_cls not in CLASSES or int(difficult)==1:
continue
cls_id=CLASSES.index(obj_cls)
xmlbox=obj.find("bndbox")
points=(float(xmlbox.find("xmin").text),
float(xmlbox.find("xmax").text),
float(xmlbox.find("ymin").text),
float(xmlbox.find("ymax").text))
bb=convert((w,h),points)
out_file.write(str(cls_id)+" "+" ".join([str(a) for a in bb])+"\n")
def make_label_txt():
# labels文件夹下创建image_id.txt
# 对应每个image_id.xml提取出的bbox信息
filenames=os.listdir(xml_input)
for file in filenames:
convert_annotation(file)
if __name__=="__main__":
# 开始提取和转换
make_label_txt()