根据新图像的宽度和高度更改xml文件中的边界框坐标

Question

我正在尝试针对新图像的宽度和高度转换xml文件中的边界框坐标。示例XML文件如下：

<annotations>
 <image height="940" id="3" name="C_00080.jpg" width="1820">
  <box label="Objects" occluded="0" xbr="801.99255" xtl="777.78656" ybr="506.9955" ytl="481.82132">
   <attribute name="Class">B</attribute>
  </box>
  <box label="Objects" occluded="0" xbr="999.319" xtl="963.38654" ybr="519.2735" ytl="486.68628">
   <attribute name="Class">A</attribute>
  </box>
 </image>
<annotations>

xml中原始图像的宽度和高度为1820x940，并且框坐标相同。我想将框坐标更改为新图像的宽度和高度，即1080x720。我已经编写了这段代码，有人可以帮助我验证或告诉我以下代码的更好方法。

import xml.etree.ElementTree as ET

label_file = '1.xml'
tree = ET.parse(label_file)
root = tree.getroot()

for image in root.findall('image'):
    image.attrib['width'] = '1080'  # Original width = 1820
    image.attrib['height'] = '720'  # Original width = 940
    for allBboxes in image.findall('box'):
        xmin = float(allBboxes.attrib['xtl'])
        xminNew = float(xmin / (1820/1080))
        xminNew = float("{:.5f}".format(xminNew))
        allBboxes.attrib['xtl'] = str(xminNew)
        ymin = float(allBboxes.attrib['ytl'])
        yminNew = float(ymin / (940/720))
        yminNew = float("{:.5f}".format(yminNew))
        allBboxes.attrib['ytl'] = str(yminNew)
        xmax = float(allBboxes.attrib['xbr'])
        xmaxNew = float(xmax / (1820/1080))
        xmaxNew = float("{:.5f}".format(xmaxNew))
        allBboxes.attrib['xbr'] = str(xmaxNew)
        ymax = float(allBboxes.attrib['ybr'])
        ymaxNew = float(ymax / (940/720))
        ymaxNew = float("{:.5f}".format(ymaxNew))
        allBboxes.attrib['ybr'] = str(ymaxNew)

tree.write(label_file)

Answer 1

计算循环前的比率

删除无用的浮点转换

删除除法（除法是一个乘法）

Answer 2

XSLT

（另存为.xsl文件）