150 lines
4.6 KiB
Python
150 lines
4.6 KiB
Python
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 xml.dom import minidom
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from lxml import etree
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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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reparsed = minidom.parseString(rough_string)
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return reparsed.toprettyxml(indent="\t")
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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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name.text = str(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 = open(self.filename + '.xml','w')
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else:
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out_file = open(targetFile, 'w')
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out_file.write(self.prettify(root))
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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, rect):
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xmin = rect[0]
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ymin = rect[1]
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xmax = rect[2]
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ymax = rect[3]
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points = [(xmin,ymin), (xmin,ymax), (xmax, ymax), (xmax, ymin)]
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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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xmltree = ElementTree.parse(self.filepath).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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rects = []
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bndbox = object_iter.find("bndbox")
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rects.append([int(it.text) for it in bndbox])
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label = object_iter.find('name').text
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for rect in rects:
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self.addShape(label, rect)
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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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