convert yolo format to pascal voc code example
Example: pascal voc to yolo
import glob
import os
import pickle
import xml.etree.ElementTree as ET
from os import listdir, getcwd
from os.path import join
dirs = ['train', 'val']
classes = ['person', 'car']
def getImagesInDir(dir_path):
image_list = []
for filename in glob.glob(dir_path + '/*.jpg'):
image_list.append(filename)
return image_list
def convert(size, box):
dw = 1./(size[0])
dh = 1./(size[1])
x = (box[0] + box[1])/2.0 - 1
y = (box[2] + box[3])/2.0 - 1
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(dir_path, output_path, image_path):
basename = os.path.basename(image_path)
basename_no_ext = os.path.splitext(basename)[0]
in_file = open(dir_path + '/' + basename_no_ext + '.xml')
out_file = open(output_path + basename_no_ext + '.txt', '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')
cwd = getcwd()
for dir_path in dirs:
full_dir_path = cwd + '/' + dir_path
output_path = full_dir_path +'/yolo/'
if not os.path.exists(output_path):
os.makedirs(output_path)
image_paths = getImagesInDir(full_dir_path)
list_file = open(full_dir_path + '.txt', 'w')
for image_path in image_paths:
list_file.write(image_path + '\n')
convert_annotation(full_dir_path, output_path, image_path)
list_file.close()
print("Finished processing: " + dir_path)