158 lines
5.0 KiB
Python
158 lines
5.0 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf8 -*-
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import _init_path
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import sys
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from xml.etree import ElementTree
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from xml.etree.ElementTree import Element, SubElement
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from lxml import etree
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import codecs
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XML_EXT = '.xml'
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class PascalVocWriter:
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def __init__(self, foldername, filename, imgSize, databaseSrc='Unknown', localImgPath=None):
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self.foldername = foldername
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self.filename = filename
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self.databaseSrc = databaseSrc
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self.imgSize = imgSize
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self.boxlist = []
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self.localImgPath = localImgPath
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def prettify(self, elem):
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"""
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Return a pretty-printed XML string for the Element.
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"""
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rough_string = ElementTree.tostring(elem, 'utf8')
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root = etree.fromstring(rough_string)
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return etree.tostring(root, pretty_print=True)
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def genXML(self):
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"""
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Return XML root
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"""
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# Check conditions
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if self.filename is None or \
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self.foldername is None or \
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self.imgSize is None or \
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len(self.boxlist) <= 0:
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return None
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top = Element('annotation')
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folder = SubElement(top, 'folder')
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folder.text = self.foldername
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filename = SubElement(top, 'filename')
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filename.text = self.filename
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localImgPath = SubElement(top, 'path')
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localImgPath.text = self.localImgPath
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source = SubElement(top, 'source')
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database = SubElement(source, 'database')
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database.text = self.databaseSrc
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size_part = SubElement(top, 'size')
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width = SubElement(size_part, 'width')
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height = SubElement(size_part, 'height')
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depth = SubElement(size_part, 'depth')
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width.text = str(self.imgSize[1])
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height.text = str(self.imgSize[0])
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if len(self.imgSize) == 3:
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depth.text = str(self.imgSize[2])
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else:
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depth.text = '1'
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segmented = SubElement(top, 'segmented')
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segmented.text = '0'
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return top
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def addBndBox(self, xmin, ymin, xmax, ymax, name):
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bndbox = {'xmin': xmin, 'ymin': ymin, 'xmax': xmax, 'ymax': ymax}
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bndbox['name'] = name
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self.boxlist.append(bndbox)
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def appendObjects(self, top):
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for each_object in self.boxlist:
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object_item = SubElement(top, 'object')
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name = SubElement(object_item, 'name')
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try:
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name.text = unicode(each_object['name'])
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except NameError:
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# Py3: NameError: name 'unicode' is not defined
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name.text = each_object['name']
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pose = SubElement(object_item, 'pose')
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pose.text = "Unspecified"
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truncated = SubElement(object_item, 'truncated')
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truncated.text = "0"
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difficult = SubElement(object_item, 'difficult')
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difficult.text = "0"
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bndbox = SubElement(object_item, 'bndbox')
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xmin = SubElement(bndbox, 'xmin')
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xmin.text = str(each_object['xmin'])
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ymin = SubElement(bndbox, 'ymin')
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ymin.text = str(each_object['ymin'])
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xmax = SubElement(bndbox, 'xmax')
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xmax.text = str(each_object['xmax'])
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ymax = SubElement(bndbox, 'ymax')
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ymax.text = str(each_object['ymax'])
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def save(self, targetFile=None):
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root = self.genXML()
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self.appendObjects(root)
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out_file = None
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if targetFile is None:
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out_file = codecs.open(
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self.filename + XML_EXT, 'w', encoding='utf-8')
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else:
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out_file = codecs.open(targetFile, 'w', encoding='utf-8')
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prettifyResult = self.prettify(root)
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out_file.write(prettifyResult.decode('utf8'))
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out_file.close()
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class PascalVocReader:
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def __init__(self, filepath):
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# shapes type:
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# [labbel, [(x1,y1), (x2,y2), (x3,y3), (x4,y4)], color, color]
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self.shapes = []
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self.filepath = filepath
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self.parseXML()
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def getShapes(self):
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return self.shapes
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def addShape(self, label, bndbox):
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xmin = int(bndbox.find('xmin').text)
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ymin = int(bndbox.find('ymin').text)
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xmax = int(bndbox.find('xmax').text)
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ymax = int(bndbox.find('ymax').text)
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points = [(xmin, ymin), (xmax, ymin), (xmax, ymax), (xmin, ymax)]
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self.shapes.append((label, points, None, None))
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def parseXML(self):
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assert self.filepath.endswith('.xml'), "Unsupport file format"
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parser = etree.XMLParser(encoding='utf-8')
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xmltree = ElementTree.parse(self.filepath, parser=parser).getroot()
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filename = xmltree.find('filename').text
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for object_iter in xmltree.findall('object'):
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bndbox = object_iter.find("bndbox")
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label = object_iter.find('name').text
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self.addShape(label, bndbox)
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return True
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# tempParseReader = PascalVocReader('test.xml')
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# print tempParseReader.getShapes()
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"""
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# Test
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tmp = PascalVocWriter('temp','test', (10,20,3))
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tmp.addBndBox(10,10,20,30,'chair')
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tmp.addBndBox(1,1,600,600,'car')
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tmp.save()
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"""
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