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| # Copyright (C) 2021-2024, Mindee. | |
| # This program is licensed under the Apache License 2.0. | |
| # See LICENSE or go to <https://opensource.org/licenses/Apache-2.0> for full license details. | |
| import os | |
| from typing import Any, Dict, List, Tuple, Union | |
| import defusedxml.ElementTree as ET | |
| import numpy as np | |
| from tqdm import tqdm | |
| from .datasets import VisionDataset | |
| from .utils import convert_target_to_relative, crop_bboxes_from_image | |
| __all__ = ["SVT"] | |
| class SVT(VisionDataset): | |
| """SVT dataset from `"The Street View Text Dataset - UCSD Computer Vision" | |
| <http://vision.ucsd.edu/~kai/svt/>`_. | |
| .. image:: https://doctr-static.mindee.com/models?id=v0.5.0/svt-grid.png&src=0 | |
| :align: center | |
| >>> from doctr.datasets import SVT | |
| >>> train_set = SVT(train=True, download=True) | |
| >>> img, target = train_set[0] | |
| Args: | |
| ---- | |
| train: whether the subset should be the training one | |
| use_polygons: whether polygons should be considered as rotated bounding box (instead of straight ones) | |
| recognition_task: whether the dataset should be used for recognition task | |
| **kwargs: keyword arguments from `VisionDataset`. | |
| """ | |
| URL = "http://vision.ucsd.edu/~kai/svt/svt.zip" | |
| SHA256 = "63b3d55e6b6d1e036e2a844a20c034fe3af3c32e4d914d6e0c4a3cd43df3bebf" | |
| def __init__( | |
| self, | |
| train: bool = True, | |
| use_polygons: bool = False, | |
| recognition_task: bool = False, | |
| **kwargs: Any, | |
| ) -> None: | |
| super().__init__( | |
| self.URL, | |
| None, | |
| self.SHA256, | |
| True, | |
| pre_transforms=convert_target_to_relative if not recognition_task else None, | |
| **kwargs, | |
| ) | |
| self.train = train | |
| self.data: List[Tuple[Union[str, np.ndarray], Union[str, Dict[str, Any]]]] = [] | |
| np_dtype = np.float32 | |
| # Load xml data | |
| tmp_root = os.path.join(self.root, "svt1") if self.SHA256 else self.root | |
| xml_tree = ( | |
| ET.parse(os.path.join(tmp_root, "train.xml")) | |
| if self.train | |
| else ET.parse(os.path.join(tmp_root, "test.xml")) | |
| ) | |
| xml_root = xml_tree.getroot() | |
| for image in tqdm(iterable=xml_root, desc="Unpacking SVT", total=len(xml_root)): | |
| name, _, _, _resolution, rectangles = image | |
| # File existence check | |
| if not os.path.exists(os.path.join(tmp_root, name.text)): | |
| raise FileNotFoundError(f"unable to locate {os.path.join(tmp_root, name.text)}") | |
| if use_polygons: | |
| # (x, y) coordinates of top left, top right, bottom right, bottom left corners | |
| _boxes = [ | |
| [ | |
| [float(rect.attrib["x"]), float(rect.attrib["y"])], | |
| [float(rect.attrib["x"]) + float(rect.attrib["width"]), float(rect.attrib["y"])], | |
| [ | |
| float(rect.attrib["x"]) + float(rect.attrib["width"]), | |
| float(rect.attrib["y"]) + float(rect.attrib["height"]), | |
| ], | |
| [float(rect.attrib["x"]), float(rect.attrib["y"]) + float(rect.attrib["height"])], | |
| ] | |
| for rect in rectangles | |
| ] | |
| else: | |
| # x_min, y_min, x_max, y_max | |
| _boxes = [ | |
| [ | |
| float(rect.attrib["x"]), # type: ignore[list-item] | |
| float(rect.attrib["y"]), # type: ignore[list-item] | |
| float(rect.attrib["x"]) + float(rect.attrib["width"]), # type: ignore[list-item] | |
| float(rect.attrib["y"]) + float(rect.attrib["height"]), # type: ignore[list-item] | |
| ] | |
| for rect in rectangles | |
| ] | |
| boxes: np.ndarray = np.asarray(_boxes, dtype=np_dtype) | |
| # Get the labels | |
| labels = [lab.text for rect in rectangles for lab in rect] | |
| if recognition_task: | |
| crops = crop_bboxes_from_image(img_path=os.path.join(tmp_root, name.text), geoms=boxes) | |
| for crop, label in zip(crops, labels): | |
| if crop.shape[0] > 0 and crop.shape[1] > 0 and len(label) > 0: | |
| self.data.append((crop, label)) | |
| else: | |
| self.data.append((name.text, dict(boxes=boxes, labels=labels))) | |
| self.root = tmp_root | |
| def extra_repr(self) -> str: | |
| return f"train={self.train}" | |