I want to convert a polygon annotation through voclabel.py to yolo format, but there is always error because of this file convert rectangle shape only
Try this one: https://github.com/ssaru/convert2Yolo , it boils down to this class:
class VOC:
"""
Handler Class for VOC PASCAL Format
"""
def xml_indent(self, elem, level=0):
i = "\n" + level * "\t"
if len(elem):
if not elem.text or not elem.text.strip():
elem.text = i + "\t"
if not elem.tail or not elem.tail.strip():
elem.tail = i
for elem in elem:
self.xml_indent(elem, level + 1)
if not elem.tail or not elem.tail.strip():
elem.tail = i
else:
if level and (not elem.tail or not elem.tail.strip()):
elem.tail = i
def generate(self, data):
try:
xml_list = {}
progress_length = len(data)
progress_cnt = 0
printProgressBar(0, progress_length, prefix='\nVOC Generate:'.ljust(15), suffix='Complete', length=40)
for key in data:
element = data[key]
xml_annotation = Element("annotation")
xml_size = Element("size")
xml_width = Element("width")
xml_width.text = element["size"]["width"]
xml_size.append(xml_width)
xml_height = Element("height")
xml_height.text = element["size"]["height"]
xml_size.append(xml_height)
xml_depth = Element("depth")
xml_depth.text = element["size"]["depth"]
xml_size.append(xml_depth)
xml_annotation.append(xml_size)
xml_segmented = Element("segmented")
xml_segmented.text = "0"
xml_annotation.append(xml_segmented)
if int(element["objects"]["num_obj"]) < 1:
return False, "number of Object less than 1"
for i in range(0, int(element["objects"]["num_obj"])):
xml_object = Element("object")
obj_name = Element("name")
obj_name.text = element["objects"][str(i)]["name"]
xml_object.append(obj_name)
obj_pose = Element("pose")
obj_pose.text = "Unspecified"
xml_object.append(obj_pose)
obj_truncated = Element("truncated")
obj_truncated.text = "0"
xml_object.append(obj_truncated)
obj_difficult = Element("difficult")
obj_difficult.text = "0"
xml_object.append(obj_difficult)
xml_bndbox = Element("bndbox")
obj_xmin = Element("xmin")
obj_xmin.text = element["objects"][str(i)]["bndbox"]["xmin"]
xml_bndbox.append(obj_xmin)
obj_ymin = Element("ymin")
obj_ymin.text = element["objects"][str(i)]["bndbox"]["ymin"]
xml_bndbox.append(obj_ymin)
obj_xmax = Element("xmax")
obj_xmax.text = element["objects"][str(i)]["bndbox"]["xmax"]
xml_bndbox.append(obj_xmax)
obj_ymax = Element("ymax")
obj_ymax.text = element["objects"][str(i)]["bndbox"]["ymax"]
xml_bndbox.append(obj_ymax)
xml_object.append(xml_bndbox)
xml_annotation.append(xml_object)
self.xml_indent(xml_annotation)
xml_list[key.split(".")[0]] = xml_annotation
printProgressBar(progress_cnt + 1, progress_length, prefix='VOC Generate:'.ljust(15), suffix='Complete', length=40)
progress_cnt += 1
return True, xml_list
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
msg = "ERROR : {}, moreInfo : {}\t{}\t{}".format(e, exc_type, fname, exc_tb.tb_lineno)
return False, msg
@staticmethod
def save(xml_list, path):
try:
path = os.path.abspath(path)
progress_length = len(xml_list)
progress_cnt = 0
printProgressBar(0, progress_length, prefix='\nVOC Save:'.ljust(10), suffix='Complete', length=40)
for key in xml_list:
xml = xml_list[key]
filepath = os.path.join(path, "".join([key, ".xml"]))
ElementTree(xml).write(filepath)
printProgressBar(progress_cnt + 1, progress_length, prefix='VOC Save:'.ljust(15), suffix='Complete', length=40)
progress_cnt += 1
return True, None
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
msg = "ERROR : {}, moreInfo : {}\t{}\t{}".format(e, exc_type, fname, exc_tb.tb_lineno)
return False, msg
@staticmethod
def parse(path):
try:
(dir_path, dir_names, filenames) = next(os.walk(os.path.abspath(path)))
data = {}
progress_length = len(filenames)
progress_cnt = 0
printProgressBar(0, progress_length, prefix='\nVOC Parsing:'.ljust(15), suffix='Complete', length=40)
for filename in filenames:
xml = open(os.path.join(dir_path, filename), "r")
tree = Et.parse(xml)
root = tree.getroot()
xml_size = root.find("size")
size = {
"width": xml_size.find("width").text,
"height": xml_size.find("height").text,
"depth": xml_size.find("depth").text
}
objects = root.findall("object")
if len(objects) == 0:
return False, "number object zero"
obj = {
"num_obj": len(objects)
}
obj_index = 0
for _object in objects:
tmp = {
"name": _object.find("name").text
}
xml_bndbox = _object.find("bndbox")
bndbox = {
"xmin": float(xml_bndbox.find("xmin").text),
"ymin": float(xml_bndbox.find("ymin").text),
"xmax": float(xml_bndbox.find("xmax").text),
"ymax": float(xml_bndbox.find("ymax").text)
}
tmp["bndbox"] = bndbox
obj[str(obj_index)] = tmp
obj_index += 1
annotation = {
"size": size,
"objects": obj
}
data[root.find("filename").text.split(".")[0]] = annotation
printProgressBar(progress_cnt + 1, progress_length, prefix='VOC Parsing:'.ljust(15), suffix='Complete', length=40)
progress_cnt += 1
return True, data
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
msg = "ERROR : {}, moreInfo : {}\t{}\t{}".format(e, exc_type, fname, exc_tb.tb_lineno)
return False, msg
And focus on the parse function, that is what you need to convert the labels properly.