#!/usr/bin/env python3
#
# Copyright 2021 Graviti. Licensed under MIT License.
#
# pylint: disable=invalid-name, missing-module-docstring
import os
from ...dataset import Data, Dataset
from ...exception import ModuleImportError
from ...label import LabeledBox2D
_SEGMENT_NAMES = ("train", "val")
DATASET_NAME = "VOC2012ActionClassification"
[docs]def VOC2012ActionClassification(path: str) -> Dataset:
"""Dataloader of the 'VOC2012ActionClassification'_ dataset.
.. _VOC2012ActionClassification: http://host.robots.ox.ac.uk/pascal/VOC/voc2012/
The file structure should be like::
<path>
Annotations/
<image_name>.xml
...
JPEGImages/
<image_name>.jpg
...
ImageSets/
Action/
train.txt
val.txt
...
...
...
Arguments:
path: The root directory of the dataset.
Returns:
Loaded :class: `~tensorbay.dataset.dataset.Dataset` instance.
"""
root_path = os.path.abspath(os.path.expanduser(path))
annotation_path = os.path.join(root_path, "Annotations")
image_path = os.path.join(root_path, "JPEGImages")
action_path = os.path.join(root_path, "ImageSets", "Action")
dataset = Dataset(DATASET_NAME)
dataset.load_catalog(os.path.join(os.path.dirname(__file__), "catalog.json"))
for segment_name in _SEGMENT_NAMES:
segment = dataset.create_segment(segment_name)
with open(os.path.join(action_path, f"{segment_name}.txt")) as fp:
for filename in fp:
filename = filename.strip()
segment.append(_get_data(filename, image_path, annotation_path))
return dataset
def _get_data(filename: str, image_path: str, annotation_path: str) -> Data:
try:
import xmltodict # pylint: disable=import-outside-toplevel
except ModuleNotFoundError as error:
raise ModuleImportError(module_name=error.name) from error
data = Data(os.path.join(image_path, f"{filename}.jpg"))
box2d = []
with open(os.path.join(annotation_path, f"{filename}.xml"), "r") as fp:
objects = xmltodict.parse(fp.read())["annotation"]["object"]
if not isinstance(objects, list):
objects = [objects]
for item in objects:
category = item["name"]
attributes = {k: bool(int(v)) for k, v in item["actions"].items()}
bndbox = item["bndbox"]
box2d.append(
LabeledBox2D(
float(bndbox["xmin"]),
float(bndbox["ymin"]),
float(bndbox["xmax"]),
float(bndbox["ymax"]),
category=category,
attributes=attributes,
)
)
data.label.box2d = box2d
return data