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| import xml.etree.ElementTree as ET
| import pickle
| import os
| from os import listdir, getcwd
| from os.path import join
|
| sets=[('2012', 'train'), ('2012', 'val'), ('2007', 'train'), ('2007', 'val'), ('2007', 'test')]
|
| classes = ["aeroplane", "bicycle", "bird", "boat", "bottle", "bus", "car", "cat", "chair", "cow", "diningtable", "dog", "horse", "motorbike", "person", "pottedplant", "sheep", "sofa", "train", "tvmonitor"]
|
|
| def convert(size, box):
| dw = 1./size[0]
| dh = 1./size[1]
| x = (box[0] + box[1])/2.0
| y = (box[2] + box[3])/2.0
| w = box[1] - box[0]
| h = box[3] - box[2]
| x = x*dw
| w = w*dw
| y = y*dh
| h = h*dh
| return (x,y,w,h)
|
| def convert_annotation(year, image_id):
| in_file = open('VOCdevkit/VOC%s/Annotations/%s.xml'%(year, image_id))
| out_file = open('VOCdevkit/VOC%s/labels/%s.txt'%(year, image_id), 'w')
| tree=ET.parse(in_file)
| root = tree.getroot()
| size = root.find('size')
| w = int(size.find('width').text)
| h = int(size.find('height').text)
|
| for obj in root.iter('object'):
| difficult = obj.find('difficult').text
| cls = obj.find('name').text
| if cls not in classes or int(difficult) == 1:
| continue
| cls_id = classes.index(cls)
| 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))
| bb = convert((w,h), b)
| out_file.write(str(cls_id) + " " + " ".join([str(a) for a in bb]) + '\n')
|
| wd = getcwd()
|
| for year, image_set in sets:
| if not os.path.exists('VOCdevkit/VOC%s/labels/'%(year)):
| os.makedirs('VOCdevkit/VOC%s/labels/'%(year))
| image_ids = open('VOCdevkit/VOC%s/ImageSets/Main/%s.txt'%(year, image_set)).read().strip().split()
| list_file = open('%s_%s.txt'%(year, image_set), 'w')
| for image_id in image_ids:
| list_file.write('%s/VOCdevkit/VOC%s/JPEGImages/%s.jpg\n'%(wd, year, image_id))
| convert_annotation(year, image_id)
| list_file.close()
|
|
