# Copyright (C) 2020-2023 Intel Corporation
#
# SPDX-License-Identifier: MIT
import errno
import os
import os.path as osp
import re
from typing import List, Optional
from datumaro.components.annotation import AnnotationType, Bbox, Label, LabelCategories
from datumaro.components.dataset_base import DatasetItem, SubsetBase
from datumaro.components.errors import MediaTypeError
from datumaro.components.exporter import Exporter
from datumaro.components.format_detection import FormatDetectionContext
from datumaro.components.importer import ImportContext, Importer
from datumaro.components.media import Image
from datumaro.util import str_to_bool
from datumaro.util.meta_file_util import has_meta_file, parse_meta_file
[docs]
class WiderFacePath:
IMAGE_EXT = ".jpg"
ANNOTATIONS_DIR = "wider_face_split"
IMAGES_DIR = "images"
SUBSET_DIR = "WIDER_"
LABELS_FILE = "labels.txt"
IMAGES_DIR_NO_LABEL = "no_label"
BBOX_ATTRIBUTES = ["blur", "expression", "illumination", "occluded", "pose", "invalid"]
DEFAULT_LABEL = "face"
[docs]
class WiderFaceBase(SubsetBase):
def __init__(
self,
path: str,
*,
subset: Optional[str] = None,
ctx: Optional[ImportContext] = None,
):
if not osp.isfile(path):
raise FileNotFoundError(errno.ENOENT, "Can't find annotations file", path)
self._path = path
self._dataset_dir = osp.dirname(osp.dirname(path))
if not subset:
subset = osp.splitext(osp.basename(path))[0]
if re.fullmatch(r"wider_face_\S+((_bbx_gt)|(_filelist))", subset):
subset = subset.split("_")[2]
super().__init__(subset=subset, ctx=ctx)
self._categories = self._load_categories()
self._items = list(self._load_items(path).values())
def _load_categories(self):
label_cat = LabelCategories()
if has_meta_file(self._dataset_dir):
labels = parse_meta_file(self._dataset_dir).keys()
for label in labels:
label_cat.add(label)
elif osp.isfile(osp.join(self._dataset_dir, WiderFacePath.LABELS_FILE)):
path = osp.join(self._dataset_dir, WiderFacePath.LABELS_FILE)
with open(path, encoding="utf-8") as labels_file:
for line in labels_file:
label_cat.add(line.strip())
else:
label_cat.add(WiderFacePath.DEFAULT_LABEL)
subset_path = osp.join(
self._dataset_dir, WiderFacePath.SUBSET_DIR + self._subset, WiderFacePath.IMAGES_DIR
)
if osp.isdir(subset_path):
for images_dir in sorted(os.listdir(subset_path)):
if (
osp.isdir(osp.join(subset_path, images_dir))
and images_dir != WiderFacePath.IMAGES_DIR_NO_LABEL
):
if "--" in images_dir:
images_dir = images_dir.split("--")[1]
if images_dir != WiderFacePath.DEFAULT_LABEL:
label_cat.add(images_dir)
if len(label_cat) == 1:
label_cat = LabelCategories()
return {AnnotationType.label: label_cat}
def _load_items(self, path):
items = {}
label_categories = self._categories[AnnotationType.label]
with open(path, "r", encoding="utf-8") as f:
lines = f.readlines()
line_ids = [
line_idx
for line_idx, line in enumerate(lines)
if ("/" in line or "\\" in line) and "." in line
] # a heuristic for paths
for line_idx in line_ids:
image_path = lines[line_idx].strip()
item_id = osp.splitext(image_path)[0]
item_id = item_id.replace("\\", "/")
image_path = osp.join(
self._dataset_dir,
WiderFacePath.SUBSET_DIR + self._subset,
WiderFacePath.IMAGES_DIR,
image_path,
)
annotations = []
if "/" in item_id:
label_name = item_id.split("/")[0]
if "--" in label_name:
label_name = label_name.split("--")[1]
if label_name != WiderFacePath.IMAGES_DIR_NO_LABEL:
label = label_categories.find(label_name)[0]
if label is not None:
annotations.append(Label(label=label))
self._ann_types.add(AnnotationType.label)
item_id = item_id[len(item_id.split("/")[0]) + 1 :]
items[item_id] = DatasetItem(
id=item_id,
subset=self._subset,
media=Image.from_file(path=image_path),
annotations=annotations,
)
try:
bbox_count = int(lines[line_idx + 1])
except ValueError: # can be the next image
continue
except IndexError: # the file can only contain names of images
continue
bbox_lines = lines[line_idx + 2 : line_idx + bbox_count + 2]
for bbox in bbox_lines:
bbox_list = bbox.split()
if 4 <= len(bbox_list):
label = label_categories.find(WiderFacePath.DEFAULT_LABEL)[0]
if len(bbox_list) == 5 or len(bbox_list) == 11:
label_name = bbox_list[-1]
label = label_categories.find(label_name)[0]
if label is None and len(label_categories) == 0:
label_categories.add(WiderFacePath.DEFAULT_LABEL)
label = label_categories.find(WiderFacePath.DEFAULT_LABEL)[0]
attributes = {}
if 10 <= len(bbox_list):
i = 4
for attr in WiderFacePath.BBOX_ATTRIBUTES:
if bbox_list[i] != "-":
if bbox_list[i] in ["True", "False"]:
attributes[attr] = str_to_bool(bbox_list[i])
else:
attributes[attr] = bbox_list[i]
i += 1
items[item_id].annotations.append(
Bbox(
float(bbox_list[0]),
float(bbox_list[1]),
float(bbox_list[2]),
float(bbox_list[3]),
attributes=attributes,
label=label,
)
)
self._ann_types.add(AnnotationType.bbox)
return items
[docs]
class WiderFaceImporter(Importer):
_ANNO_EXT = ".txt"
[docs]
@classmethod
def detect(cls, context: FormatDetectionContext) -> None:
context.require_file(f"{WiderFacePath.ANNOTATIONS_DIR}/*{cls._ANNO_EXT}")
[docs]
@classmethod
def find_sources(cls, path):
return cls._find_sources_recursive(
path, cls._ANNO_EXT, "wider_face", dirname=WiderFacePath.ANNOTATIONS_DIR
)
[docs]
@classmethod
def get_file_extensions(cls) -> List[str]:
return [cls._ANNO_EXT]
[docs]
class WiderFaceExporter(Exporter):
DEFAULT_IMAGE_EXT = WiderFacePath.IMAGE_EXT
def _apply_impl(self):
if self._extractor.media_type() and not issubclass(self._extractor.media_type(), Image):
raise MediaTypeError("Media type is not an image")
save_dir = self._save_dir
os.makedirs(save_dir, exist_ok=True)
label_categories = self._extractor.categories()[AnnotationType.label]
if self._save_dataset_meta:
self._save_meta_file(save_dir)
else:
labels_path = osp.join(save_dir, WiderFacePath.LABELS_FILE)
with open(labels_path, "w", encoding="utf-8") as f:
f.write("\n".join(label.name for label in label_categories))
for subset_name, subset in self._extractor.subsets().items():
subset_dir = osp.join(save_dir, WiderFacePath.SUBSET_DIR + subset_name)
wider_annotation = ""
for item in subset:
labels = [a.label for a in item.annotations if a.type == AnnotationType.label]
if labels:
image_path = self._make_image_filename(
item, subdir="%s--%s" % (labels[0], label_categories[labels[0]].name)
)
else:
image_path = self._make_image_filename(
item, subdir=WiderFacePath.IMAGES_DIR_NO_LABEL
)
wider_annotation += image_path + "\n"
if item.media and self._save_media:
self._save_image(
item, osp.join(save_dir, subset_dir, WiderFacePath.IMAGES_DIR, image_path)
)
bboxes = [a for a in item.annotations if a.type == AnnotationType.bbox]
if 0 < len(bboxes):
wider_annotation += "%s\n" % len(bboxes)
for bbox in bboxes:
wider_bb = " ".join("%s" % p for p in bbox.get_bbox())
wider_annotation += "%s " % wider_bb
if bbox.attributes:
wider_attr = ""
attr_counter = 0
for attr in WiderFacePath.BBOX_ATTRIBUTES:
if attr in bbox.attributes:
wider_attr += "%s " % bbox.attributes[attr]
attr_counter += 1
else:
wider_attr += "- "
if 0 < attr_counter:
wider_annotation += wider_attr
if (
label_categories[bbox.label].name != WiderFacePath.DEFAULT_LABEL
and bbox.label is not None
):
wider_annotation += "%s" % label_categories[bbox.label].name
wider_annotation += "\n"
annotation_path = osp.join(
save_dir, WiderFacePath.ANNOTATIONS_DIR, "wider_face_" + subset_name + "_bbx_gt.txt"
)
os.makedirs(osp.dirname(annotation_path), exist_ok=True)
with open(annotation_path, "w", encoding="utf-8") as f:
f.write(wider_annotation)
