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pascal_voc.py
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pascal_voc.py
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import os
import numpy as np
import xml.etree.ElementTree as ET
import cv2
# from pascal_voc_writer import Writer
import argparse
import shutil
from jinja2 import Environment, PackageLoader, FileSystemLoader
class Writer:
def __init__(self, path, width, height, depth=3, database='Unknown', segmented=0):
environment = Environment(loader=FileSystemLoader('./templates', followlinks=True))
self.annotation_template = environment.get_template('annotation.xml')
abspath = os.path.abspath(path)
self.template_parameters = {
# 'path': abspath,
'filename': os.path.basename(abspath),
'folder': os.path.basename(os.path.dirname(abspath)),
'width': width,
'height': height,
'depth': depth,
'database': database,
'segmented': segmented,
'objects': []
}
def addObject(self, name, xmin, ymin, xmax, ymax, pose='Unspecified', truncated=0, difficult=0):
self.template_parameters['objects'].append({
'name': name,
'xmin': xmin,
'ymin': ymin,
'xmax': xmax,
'ymax': ymax,
'pose': pose,
'truncated': truncated,
'difficult': difficult,
})
def save(self, annotation_path):
with open(annotation_path, 'w') as file:
content = self.annotation_template.render(**self.template_parameters)
file.write(content)
def parse_args():
"""Parse arguments of command line"""
parser = argparse.ArgumentParser(
description='Convert xxx XML annotations to PASCAL VOC format'
)
parser.add_argument(
'--data_dir', metavar='DIRECTORY', required=True,
help='directory which contains original images'
)
parser.add_argument(
'--output_dir', metavar='DIRECTORY', required=True,
help='directory for output annotations in PASCAL VOC format'
)
return parser.parse_args()
def process_voc_xml(data_dir, output_dir):
xml_dir = os.path.join(data_dir, "Annotations")
for item in os.listdir(xml_dir):
anno_file = os.path.join(data_dir, "Annotations", item)
jpeg_file = os.path.join(data_dir, "JPEGImages", os.path.splitext(item)[0] + ".jpg")
if not os.path.exists(jpeg_file):
print(jpeg_file)
continue
tree = ET.parse(anno_file)
print(anno_file)
image_name = tree.find("filename").text
width = int(tree.findall("./size/width")[0].text)
height = int(tree.findall("./size/height")[0].text)
if tree.find("./size/channel") != None :
depth = int(tree.findall("./size/channel")[0].text)
else:
depth = int(tree.findall("./size/depth")[0].text)
image_path = os.path.join(data_dir, "JPEGImages", image_name)
writer = Writer(image_path, width, height, depth=depth)
for obj in tree.findall('object'):
cls = obj.find("name").text
bbox = obj.find("bndbox")
xmin = min(max(int(float(bbox.find("xmin").text)), 0), width - 1)
ymin = min(max(int(float(bbox.find("ymin").text)), 0), height - 1)
xmax = min(max(int(float(bbox.find("xmax").text)), 0), width - 1)
ymax = min(max(int(float(bbox.find("ymax").text)), 0), height - 1)
writer.addObject(cls, xmin, ymin, xmax, ymax)
anno_name = os.path.basename(os.path.splitext(image_name)[0] + '.xml')
anno_dir = os.path.dirname(os.path.join(output_dir, "Annotations", image_name))
os.makedirs(anno_dir, exist_ok=True)
jpeg_dir = os.path.dirname(os.path.join(output_dir, "JPEGImages", image_name))
os.makedirs(jpeg_dir, exist_ok=True)
shutil.copyfile(jpeg_file, os.path.join(output_dir, "JPEGImages", image_name))
writer.save(os.path.join(anno_dir, anno_name))
def main():
args = parse_args()
process_voc_xml(args.data_dir, args.output_dir)
if __name__ == "__main__":
main()