feat: add load script

ocr-barcodes-detection.py

@@ -0,0 +1,157 @@
+from xml.etree import ElementTree as ET
+
+import datasets
+
+_CITATION = """\
+@InProceedings{huggingface:dataset,
+title = {ocr-barcodes-detection},
+author = {TrainingDataPro},
+year = {2023}
+}
+"""
+
+_DESCRIPTION = """\
+The Grocery Store Receipts Dataset is a collection of photos captured from various
+**grocery store receipts**. This dataset is specifically designed for tasks related to
+**Optical Character Recognition (OCR)** and is useful for retail.
+Each image in the dataset is accompanied by bounding box annotations, indicating the
+precise locations of specific text segments on the receipts. The text segments are
+categorized into four classes: **item, store, date_time and total**.
+"""
+_NAME = "ocr-barcodes-detection"
+
+_HOMEPAGE = f"https://huggingface.co/datasets/TrainingDataPro/{_NAME}"
+
+_LICENSE = ""
+
+_DATA = f"https://huggingface.co/datasets/TrainingDataPro/{_NAME}/resolve/main/data/"
+
+_LABELS = ["Barcode"]
+
+
+class OcrBarcodesDetection(datasets.GeneratorBasedBuilder):
+    def _info(self):
+        return datasets.DatasetInfo(
+            description=_DESCRIPTION,
+            features=datasets.Features(
+                {
+                    "id": datasets.Value("int32"),
+                    "name": datasets.Value("string"),
+                    "image": datasets.Image(),
+                    "mask": datasets.Image(),
+                    "width": datasets.Value("uint16"),
+                    "height": datasets.Value("uint16"),
+                    "shapes": datasets.Sequence(
+                        {
+                            "label": datasets.ClassLabel(
+                                num_classes=len(_LABELS),
+                                names=_LABELS,
+                            ),
+                            "type": datasets.Value("string"),
+                            "points": datasets.Sequence(
+                                datasets.Sequence(
+                                    datasets.Value("float"),
+                                ),
+                            ),
+                            "rotation": datasets.Value("float"),
+                            "occluded": datasets.Value("uint8"),
+                            "attributes": datasets.Sequence(
+                                {
+                                    "name": datasets.Value("string"),
+                                    "text": datasets.Value("string"),
+                                }
+                            ),
+                        }
+                    ),
+                }
+            ),
+            supervised_keys=None,
+            homepage=_HOMEPAGE,
+            citation=_CITATION,
+        )
+
+    def _split_generators(self, dl_manager):
+        images = dl_manager.download(f"{_DATA}images.tar.gz")
+        masks = dl_manager.download(f"{_DATA}boxes.tar.gz")
+        annotations = dl_manager.download(f"{_DATA}annotations.xml")
+        images = dl_manager.iter_archive(images)
+        masks = dl_manager.iter_archive(masks)
+        return [
+            datasets.SplitGenerator(
+                name=datasets.Split.TRAIN,
+                gen_kwargs={
+                    "images": images,
+                    "masks": masks,
+                    "annotations": annotations,
+                },
+            ),
+        ]
+
+    @staticmethod
+    def parse_shape(shape: ET.Element) -> dict:
+        label = shape.get("label")
+        shape_type = shape.tag
+        rotation = shape.get("rotation", 0.0)
+        occluded = shape.get("occluded", 0)
+
+        points = None
+
+        if shape_type == "points":
+            points = tuple(map(float, shape.get("points").split(",")))
+
+        elif shape_type == "box":
+            points = [
+                (float(shape.get("xtl")), float(shape.get("ytl"))),
+                (float(shape.get("xbr")), float(shape.get("ybr"))),
+            ]
+
+        elif shape_type == "polygon":
+            points = [
+                tuple(map(float, point.split(",")))
+                for point in shape.get("points").split(";")
+            ]
+
+        attributes = []
+
+        for attr in shape:
+            attr_name = attr.get("name")
+            attr_text = attr.text
+            attributes.append({"name": attr_name, "text": attr_text})
+
+        shape_data = {
+            "label": label,
+            "type": shape_type,
+            "points": points,
+            "rotation": rotation,
+            "occluded": occluded,
+            "attributes": attributes,
+        }
+
+        return shape_data
+
+    def _generate_examples(self, images, masks, annotations):
+        tree = ET.parse(annotations)
+        root = tree.getroot()
+
+        for idx, (
+            (image_path, image),
+            (mask_path, mask),
+        ) in enumerate(zip(images, masks)):
+            image_name = image_path.split("/")[-1]
+            img = root.find(f"./image[@name='images/{image_name}']")
+
+            image_id = img.get("id")
+            name = img.get("name")
+            width = img.get("width")
+            height = img.get("height")
+            shapes = [self.parse_shape(shape) for shape in img]
+
+            yield idx, {
+                "id": image_id,
+                "name": name,
+                "image": {"path": image_path, "bytes": image.read()},
+                "mask": {"path": mask_path, "bytes": mask.read()},
+                "width": width,
+                "height": height,
+                "shapes": shapes,
+            }