cls_id = classes.index(cls)
时间: 2024-05-25 10:15:18 浏览: 11
I'm sorry, as an AI language model, I don't have enough context to provide a precise answer to your question. Can you please provide more information about the code snippet you provided? What programming language are you using? What is the value of `cls` and `classes`? What are you trying to achieve with this line of code? The more information you can provide, the better I can assist you.
相关问题
for obj in root.iter('object'): cls = obj.find('name').text print(cls) if cls not in classes: continue cls_id = classes.index(cls) print(cls_id) xmlbox = obj.find('bndbox') b = (float(xmlbox.find('xmin').text), float(xmlbox.find('xmax').text), float(xmlbox.find('ymin').text), float(xmlbox.find('ymax').text))
这段代码的作用是读取一个 XML 文件中的目标检测标注信息,并将其转换为一个包含目标类别和位置信息的元组列表。
具体来说,代码首先使用 `root.iter('object')` 遍历 XML 文件中所有的目标物体,然后找到目标物体的类别名称和位置信息。其中,类别名称在 XML 文件中以 `<name>` 标签的文本形式给出,位置信息则是由 `<xmin>`、`<xmax>`、`<ymin>` 和 `<ymax>` 这四个标签分别表示左上角和右下角的坐标值。
接着,代码将类别名称转换为类别索引 `cls_id`,然后将类别名称和位置信息打包成一个元组 `(cls_id, b)`,并将其添加到一个列表中。最后,代码返回该元组列表,即为目标检测标注信息的表示形式。
yolo数据集xml转txt
您可以使用以下代码将YOLO数据集的XML文件转换为TXT文件:
```python
import os
import glob
import xml.etree.ElementTree as ET
classes = ['class1', 'class2', 'class3'] # 标注的类别
def convert_annotation(xml_file):
tree = ET.parse(xml_file)
root = tree.getroot()
txt_file = os.path.splitext(xml_file)[0] + '.txt'
with open(txt_file, 'w') as f:
for obj in root.iter('object'):
cls = obj.find('name').text
if cls not in classes:
continue
cls_id = classes.index(cls)
xmlbox = obj.find('bndbox')
b = (int(xmlbox.find('xmin').text), int(xmlbox.find('ymin').text), int(xmlbox.find('xmax').text), int(xmlbox.find('ymax').text))
bb = convert((w,h), b)
f.write(str(cls_id) + " " + " ".join([str(a) for a in bb]) + '\n')
def convert(size, box):
dw = 1./size[0]
dh = 1./size[1]
x = (box[0] + box[2])/2.0
y = (box[1] + box[3])/2.0
w = box[2] - box[0]
h = box[3] - box[1]
x = x*dw
w = w*dw
y = y*dh
h = h*dh
return (x,y,w,h)
if __name__ == '__main__':
xml_files = glob.glob('path/to/xml/files/*.xml')
for xml_file in xml_files:
convert_annotation(xml_file)
```
其中,`classes`是标注的类别,`convert_annotation`函数将一个XML文件转换为一个TXT文件,`convert`函数将一个边界框的坐标转换为YOLO格式。
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