Datasets:
File size: 3,243 Bytes
4d1c378 e8fb686 4d1c378 e8fb686 4d1c378 e8fb686 4d1c378 e8fb686 4d1c378 e8fb686 4d1c378 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 |
import os
from datasets import load_dataset
from dataclasses import dataclass, field
import tqdm.auto as tqdm
from typing import List, Dict
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("../data")
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:
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] = {}
objs = image["objects"]
for i, idx in enumerate(objs["id"]):
if objs["category"][i] and objs["category"][i] not in tags:
tags[objs["category"][i]] = Tag(f"LABEL_{len(tags)}", objs["category"][i], objs["type"][i])
if objs["type"][i] == "block":
blocks[idx] = Block(idx, objs["bbox"][i], objs["polygons"][i], objs["category"][i])
else:
if objs["parent"][i] == "":
blocks[""] = Block(None, [], [], "")
if objs["baseline"][i] is None:
print(f"Line broken ? {image['shelfmark']} {idx} {objs['polygons'][i]}")
continue
blocks[objs["parent"][i]].lines.append(
Line(idx, objs["bbox"][i], objs["polygons"][i], objs["category"][i], objs['baseline'][i])
)
image["image"].convert('RGB').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
)
)
|