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