Datasets:
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import os
from datasets import load_dataset
from dataclasses import dataclass, field
import tqdm.auto as tqdm
from typing import List, Dict, Set
from jinja2 import Environment, FileSystemLoader
from shapely.geometry import Polygon
import itertools
# Load the Jinja2 template
env = Environment(loader=FileSystemLoader('.'))
template = env.get_template('template.xml')
ds = load_dataset("CATMuS/medieval-segmentation")
RATIO = .05
@dataclass
class Tag:
idx: str
label: str
element_type: str
@dataclass
class Line:
idx: str
bbox: List[int]
polygons: List[int]
category: str
baseline: List[int]
@property
def simple_polygon(self):
x = list(
map(
int,
itertools.chain(
*Polygon(
list(zip(self.polygons[::2], self.polygons[1::2])) # Flat list to list of points
).simplify(RATIO * self.height).exterior.coords
)
)
)[:-2] # Polygon repeats the starting point
return x
@property
def hpos(self):
return self.bbox[0]
@property
def vpos(self):
return self.bbox[1]
@property
def width(self):
return self.bbox[2] - self.bbox[0]
@property
def height(self):
return self.bbox[3] - self.bbox[1]
@dataclass
class Block:
idx: str
bbox: List[int]
polygons: List[int]
category: str
lines: List[Line] = field(default_factory=list)
@property
def hpos(self):
return self.bbox[0]
@property
def vpos(self):
return self.bbox[1]
@property
def width(self):
return self.bbox[2] - self.bbox[0]
@property
def height(self):
return self.bbox[3] - self.bbox[1]
for split in ds:
print(f"Split: {split}")
os.makedirs(f"altos/{split}", exist_ok=True)
for image_idx, image in enumerate(tqdm.tqdm(ds[split])):
blocks: Dict[str, Block] = {}
tags: Dict[str, Tag] = {}
print(image)
for idx, bbox, polygons, category, typ, parent, baseline in zip(*[
image["objects"][key]
for key in ['id', 'bbox', 'polygons', 'category', 'type', 'parent', "baselines"]
]):
if category and category not in tags:
tags[category] = Tag(f"LABEL_{len(tags)}", category, typ)
if typ == "block":
blocks[idx] = Block(idx, bbox, polygons, category)
else:
if parent == None:
blocks[None] = Block(None, [], [], "")
blocks[parent].lines.append(
Line(idx, bbox, polygons, category)
)
image["image"].save(f"./altos/{split}/image-{image_idx:04}.jpg")
with open(f"./altos/{split}/image-{image_idx:04}.xml", "w") as f:
f.write(
template.render(
blocks=blocks,
image=image,
path=f"image-{image_idx:04}.jpg",
tags=tags
)
)
break
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