PascalVOCGenerator.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim: set fileencoding=utf-8 :
#
# transform.py
# 
# Author:   Makoto Shimazu <[email protected]>
# URL:      https://amiq11.tumblr.com               
# License:  2-Clause BSD License                    
# Created:  2018-12-24                              
#
#
# Copyright (c) 2018, Makoto Shimazu
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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import xml.etree.ElementTree as ET


class PascalVOCGenerator():
  def __init__(self):
    self._root = ET.Element('annotations')
    self._tree = ET.ElementTree(self._root)

  def addImage(self, fileName, crackLabels):
    """Adds annotation tag for this file.
    crackLabels: array of cracks (sample: {name: 2, bb: (123 /*xmin*/, 264 /*ymin*/, 219/*xmax*/, 553 /*ymax*/)})

    difficult, truncated and pose are omitted from the output.
    """

    node = ET.SubElement(self._root, 'annotation')
    ET.SubElement(node, 'filename').text = fileName
    for crackLabel in crackLabels:
      obj = ET.SubElement(node, 'object')
      ET.SubElement(obj, 'name').text = str(crackLabel['name'])
      bndbox = ET.SubElement(obj, 'bndbox')
      ET.SubElement(bndbox, 'xmin').text = str(crackLabel['bb'][0])
      ET.SubElement(bndbox, 'ymin').text = str(crackLabel['bb'][1])
      ET.SubElement(bndbox, 'xmax').text = str(crackLabel['bb'][2])
      ET.SubElement(bndbox, 'ymax').text = str(crackLabel['bb'][3])

  def save(self, filePath):
    self._tree.write(filePath)



def test():
  pascalGenerator = PascalVOCGenerator()
  pascalGenerator.addImage('0000.jpg', [{'name': 2, 'bb': (123, 456, 789, 555)}, {'name': 3, 'bb': (000, 111, 222, 333)}])
  pascalGenerator.save('testtest.xml')

if __name__ == '__main__':
  test()