def test_json():
i = Interval(1, 2, "y", canvas_height=5)
r = Rectangle(1, 2, 3, 4)
q = Quadrilateral(np.arange(8).reshape(4, 2), 200, 400)
l = Layout([i, r, q], page_data={"width": 200, "height": 200})
i2 = TextBlock(i, "")
r2 = TextBlock(r, id=24)
q2 = TextBlock(q, text="test", parent=45)
l2 = Layout([i2, r2, q2])
i3 = TextBlock(i, None)
r3 = TextBlock(r, id=None)
q3 = TextBlock(q, text=None, parent=None)
l3 = Layout([i3, r3, q3], page_data={"width": 200, "height": 200})
# fmt: off
assert i == load_dict(i.to_dict()) == load_json("tests/fixtures/io/interval.json")
assert r == load_dict(r.to_dict()) == load_json("tests/fixtures/io/rectangle.json")
assert q == load_dict(q.to_dict()) == load_json("tests/fixtures/io/quadrilateral.json")
assert l == load_dict(l.to_dict()) == load_json("tests/fixtures/io/layout.json")
assert i2 == load_dict(i2.to_dict()) == load_json("tests/fixtures/io/interval_textblock.json")
assert r2 == load_dict(r2.to_dict()) == load_json("tests/fixtures/io/rectangle_textblock.json")
assert q2 == load_dict(q2.to_dict()) == load_json("tests/fixtures/io/quadrilateral_textblock.json")
assert l2 == load_dict(l2.to_dict()) == load_json("tests/fixtures/io/layout_textblock.json")
# Test if LP can ignore the unused None features
assert l == load_dict(l3.to_dict())
def test_layout():
i = Interval(4, 5, axis="y")
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
t = TextBlock(i, id=1, type=2, text="12")
l = Layout([i, q, r])
l.get_texts()
l.condition_on(i)
l.relative_to(q)
l.filter_by(t)
l.is_in(r)
assert l.get_homogeneous_blocks() == [
i.to_quadrilateral(), q, r.to_quadrilateral()
]
i2 = TextBlock(i, id=1, type=2, text="12")
r2 = TextBlock(r, id=1, type=2, parent="a")
q2 = TextBlock(q, id=1, type=2, next="a")
l2 = Layout([i2, r2, q2], page_data={"width": 200, "height": 200})
l2.get_texts()
l2.get_info("next")
l2.condition_on(i)
l2.relative_to(q)
l2.filter_by(t)
l2.is_in(r)
l2.scale(4)
l2.shift(4)
l2.pad(left=2)
# Test slicing function
homogeneous_blocks = l2[:2].get_homogeneous_blocks()
assert homogeneous_blocks[0].block == i.to_rectangle()
assert homogeneous_blocks[1].block == r
# Test appending and extending
assert l + [i2] == Layout([i, q, r, i2])
assert l + l == Layout([i, q, r] * 2)
l.append(i)
assert l == Layout([i, q, r, i])
l2.extend([q])
assert l2 == Layout([i2, r2, q2, q],
page_data={
"width": 200,
"height": 200
})
# Test addition
l + l2
with pytest.raises(ValueError):
l.page_data = {"width": 200, "height": 400}
l + l2
def test_textblock():
i = Interval(4, 5, axis="y")
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
t = TextBlock(i, id=1, type=2, text="12")
assert (t.relative_to(q).condition_on(q).block == i.put_on_canvas(
q).to_quadrilateral())
t.area
t = TextBlock(r, id=1, type=2, parent="a")
assert t.relative_to(i).condition_on(i).block == r
t.area
t = TextBlock(q, id=1, type=2, parent="a")
assert t.relative_to(r).condition_on(r).block == q
t.area
# Ensure the operations did not change the object itself
assert t == TextBlock(q, id=1, type=2, parent="a")
t1 = TextBlock(q, id=1, type=2, parent="a")
t2 = TextBlock(i, id=1, type=2, text="12")
t1.relative_to(t2)
assert t2.is_in(t1)
t = TextBlock(q, score=0.2)
def test_quadrilateral_relations():
i = Interval(4, 5, axis="y")
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
assert not q.is_in(r)
assert q.is_in(i, soft_margin={"top": 2, "bottom": 2})
assert q.is_in(r,
soft_margin={
"left": 1,
"top": 1,
"right": 1,
"bottom": 1
})
assert q.is_in(q)
# convert to absolute then convert back to relative
assert q.condition_on(i).relative_to(i) == q
assert q.condition_on(r).relative_to(r) == q
assert q.condition_on(q).relative_to(q) == q
# convert to relative then convert back to absolute
assert q.relative_to(i).condition_on(i) == q
assert q.relative_to(r).condition_on(r) == q
assert q.relative_to(q).condition_on(q) == q
def test_layout():
i = Interval(4, 5, axis='y')
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
t = TextBlock(i, id=1, type=2, text="12")
l = Layout([i, q, r])
l.get_texts()
l.condition_on(i)
l.relative_to(q)
l.filter_by(t)
l.is_in(r)
l = Layout([
TextBlock(i, id=1, type=2, text="12"),
TextBlock(r, id=1, type=2, parent="a"),
TextBlock(q, id=1, type=2, next="a")
])
l.get_texts()
l.get_info('next')
l.condition_on(i)
l.relative_to(q)
l.filter_by(t)
l.is_in(r)
l.scale(4)
l.shift(4)
l.pad(left=2)
def test_csv():
i = Interval(1, 2, "y", canvas_height=5)
r = Rectangle(1, 2, 3, 4)
q = Quadrilateral(np.arange(8).reshape(4, 2), 200, 400)
l = Layout([i, r, q], page_data={"width": 200, "height": 200})
_l = load_csv("tests/fixtures/io/layout.csv")
assert _l != l
_l.page_data = {"width": 200, "height": 200}
assert _l == l
i2 = TextBlock(i, "")
r2 = TextBlock(r, id=24)
q2 = TextBlock(q, text="test", parent=45)
l2 = Layout([i2, r2, q2])
_l2 = load_csv("tests/fixtures/io/layout_textblock.csv")
assert _l2 == l2
def test_interval_relations():
i = Interval(4, 5, axis="y")
r = Rectangle(3, 3, 5, 6)
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
assert i.is_in(i)
assert i.is_in(r)
assert i.is_in(q)
# convert to absolute then convert back to relative
assert i.condition_on(i).relative_to(i) == i
assert i.condition_on(r).relative_to(r) == i.put_on_canvas(
r).to_rectangle()
assert i.condition_on(q).relative_to(q) == i.put_on_canvas(
q).to_quadrilateral()
# convert to relative then convert back to absolute
assert i.relative_to(i).condition_on(i) == i
assert i.relative_to(r).condition_on(r) == i.put_on_canvas(
r).to_rectangle()
assert i.relative_to(q).condition_on(q) == i.put_on_canvas(
q).to_quadrilateral()
import json
import numpy as np
from layoutparser.elements import Interval, Rectangle, Quadrilateral, TextBlock, Layout
if __name__ == "__main__":
i = Interval(1, 2, "y", canvas_height=5)
r = Rectangle(1, 2, 3, 4)
q = Quadrilateral(np.arange(8).reshape(4, 2), 200, 400)
l = Layout([i, r, q], page_data={"width": 200, "height": 200})
with open("interval.json", "w") as fp:
json.dump(i.to_dict(), fp)
with open("rectangle.json", "w") as fp:
json.dump(r.to_dict(), fp)
with open("quadrilateral.json", "w") as fp:
json.dump(q.to_dict(), fp)
with open("layout.json", "w") as fp:
json.dump(l.to_dict(), fp)
l.to_dataframe().to_csv("layout.csv", index=None)
i2 = TextBlock(i, "")
r2 = TextBlock(r, id=24)
q2 = TextBlock(q, text="test", parent=45)
l2 = Layout([i2, r2, q2])
with open("interval_textblock.json", "w") as fp:
json.dump(i2.to_dict(), fp)
with open("rectangle_textblock.json", "w") as fp:
json.dump(r2.to_dict(), fp)
with open("quadrilateral_textblock.json", "w") as fp:
def test_rectangle():
r = Rectangle(1, 2, 3, 4)
r.to_interval(axis="x")
r.to_quadrilateral()
assert r.pad(left=1, right=5, top=2, bottom=4) == Rectangle(0, 0, 8, 8)
assert r.shift([1, 2]) == Rectangle(2, 4, 4, 6)
assert r.shift(1) == Rectangle(2, 3, 4, 5)
assert r.scale([3, 2]) == Rectangle(3, 4, 9, 8)
assert r.scale(2) == Rectangle(2, 4, 6, 8)
assert r.area == 4
img = np.random.randint(12, 24, (40, 40))
r.crop_image(img).shape == (2, 2)
def test_dict():
i = Interval(1, 2, "y", canvas_height=5)
i_dict = {
"block_type": "interval",
"start": 1,
"end": 2,
"axis": "y",
"canvas_height": 5,
"canvas_width": 0,
}
assert i.to_dict() == i_dict
assert i == Interval.from_dict(i_dict)
r = Rectangle(1, 2, 3, 4)
r_dict = {
"block_type": "rectangle",
"x_1": 1,
"y_1": 2,
"x_2": 3,
"y_2": 4
}
assert r.to_dict() == r_dict
assert r == Rectangle.from_dict(r_dict)
q = Quadrilateral(np.arange(8).reshape(4, 2), 200, 400)
q_dict = {
"block_type": "quadrilateral",
"points": [0, 1, 2, 3, 4, 5, 6, 7],
"height": 200,
"width": 400,
}
assert q.to_dict() == q_dict
assert q == Quadrilateral.from_dict(q_dict)
l = Layout([i, r, q], page_data={"width": 200, "height": 200})
l_dict = {
"page_data": {
"width": 200,
"height": 200
},
"blocks": [i_dict, r_dict, q_dict],
}
assert l.to_dict() == l_dict
i2 = TextBlock(i, "")
i_dict["text"] = ""
assert i2.to_dict() == i_dict
assert i2 == TextBlock.from_dict(i_dict)
r2 = TextBlock(r, id=24)
r_dict["id"] = 24
assert r2.to_dict() == r_dict
assert r2 == TextBlock.from_dict(r_dict)
q2 = TextBlock(q, text="test", parent=45)
q_dict["text"] = "test"
q_dict["parent"] = 45
assert q2.to_dict() == q_dict
assert q2 == TextBlock.from_dict(q_dict)
l2 = Layout([i2, r2, q2])
l2_dict = {"page_data": {}, "blocks": [i_dict, r_dict, q_dict]}
assert l2.to_dict() == l2_dict
def test_rectangle_relations():
i = Interval(4, 5, axis="y")
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
assert not r.is_in(q)
assert r.is_in(q, soft_margin={"bottom": 1})
assert r.is_in(q.to_rectangle())
assert r.is_in(q.to_interval())
# convert to absolute then convert back to relative
assert r.condition_on(i).relative_to(i) == r
assert r.condition_on(r).relative_to(r) == r
assert r.condition_on(q).relative_to(q) == r.to_quadrilateral()
# convert to relative then convert back to absolute
assert r.relative_to(i).condition_on(i) == r
assert r.relative_to(r).condition_on(r) == r
assert r.relative_to(q).condition_on(q) == r.to_quadrilateral()
def test_shape_operations():
i_1 = Interval(1, 2, axis="y", canvas_height=30, canvas_width=400)
i_2 = TextBlock(Interval(1, 2, axis="x"))
i_3 = Interval(1, 2, axis="y")
r_1 = Rectangle(0.5, 0.5, 2.5, 1.5)
r_2 = TextBlock(Rectangle(0.5, 0.5, 2, 2.5))
q_1 = Quadrilateral([[1, 1], [2.5, 1.2], [2.5, 3], [1.5, 3]])
q_2 = TextBlock(Quadrilateral([[0.5, 0.5], [2, 1], [1.5, 2.5], [0.5, 2]]))
# I and I in different axes
assert i_1.intersect(i_1) == i_1
assert i_1.intersect(i_2) == Rectangle(1, 1, 2, 2)
assert i_1.intersect(i_3) == i_1 # Ensure intersect copy the canvas size
assert i_1.union(i_1) == i_1
with pytest.raises(InvalidShapeError):
assert i_1.union(i_2) == Rectangle(1, 1, 2, 2)
# I and R in different axes
assert i_1.intersect(r_1) == Rectangle(0.5, 1, 2.5, 1.5)
assert i_2.intersect(r_1).block == Rectangle(1, 0.5, 2, 1.5)
assert i_1.union(r_1) == Rectangle(0.5, 0.5, 2.5, 2)
assert i_2.union(r_1).block == r_1
# I and Q in strict mode
with pytest.raises(NotSupportedShapeError):
i_1.intersect(q_1)
i_1.union(q_1)
# I and Q in different axes
assert i_1.intersect(q_1, strict=False) == Rectangle(1, 1, 2.5, 2)
assert i_1.union(q_1, strict=False) == Rectangle(1, 1, 2.5, 3)
assert i_2.intersect(q_1, strict=False).block == Rectangle(1, 1, 2, 3)
assert i_2.union(q_1, strict=False).block == Rectangle(1, 1, 2.5, 3)
# R and I
assert r_1.intersect(i_1) == i_1.intersect(r_1)
# R and R
assert r_1.intersect(r_2) == r_2.intersect(r_1).block == Rectangle(
0.5, 0.5, 2, 1.5)
assert r_1.union(r_2) == r_2.union(r_1).block == Rectangle(
0.5, 0.5, 2.5, 2.5)
# R and Q
with pytest.raises(NotSupportedShapeError):
r_1.intersect(q_1)
r_1.union(q_1)
assert r_1.intersect(q_1, strict=False) == Rectangle(1, 1, 2.5, 1.5)
assert r_1.union(q_1, strict=False) == Rectangle(0.5, 0.5, 2.5, 3)
assert r_1.intersect(q_2,
strict=False) == r_1.intersect(q_2.to_rectangle())
assert r_1.union(q_2, strict=False) == r_1.union(q_2.to_rectangle())
# Q and others in strict mode
with pytest.raises(NotSupportedShapeError):
q_1.intersect(i_1)
q_1.intersect(r_1)
q_1.intersect(q_2)
# Q and I
assert q_1.intersect(i_1, strict=False) == i_1.intersect(q_1, strict=False)
assert q_1.union(i_1, strict=False) == i_1.union(q_1, strict=False)
# Q and R
assert q_1.intersect(r_1, strict=False) == r_1.intersect(q_1, strict=False)
assert q_1.union(r_1, strict=False) == r_1.union(q_1, strict=False)
# Q and R
assert q_1.intersect(q_2,
strict=False) == q_2.intersect(q_1,
strict=False).block
assert q_1.intersect(q_2, strict=False) == Rectangle(1, 1, 2, 2.5)
assert q_1.union(q_2, strict=False) == q_2.union(q_1, strict=False).block
assert q_1.union(q_2, strict=False) == Rectangle(0.5, 0.5, 2.5, 3)
def test_textblock():
i = Interval(4, 5, axis="y")
q = Quadrilateral(np.array([[2, 2], [6, 2], [6, 7], [2, 5]]))
r = Rectangle(3, 3, 5, 6)
t = TextBlock(i, id=1, type=2, text="12")
assert (t.relative_to(q).condition_on(q).block == i.put_on_canvas(
q).to_quadrilateral())
t.area
t = TextBlock(r, id=1, type=2, parent="a")
assert t.relative_to(i).condition_on(i).block == r
t.area
t = TextBlock(q, id=1, type=2, parent="a")
assert t.relative_to(r).condition_on(r).block == q
t.area
# Ensure the operations did not change the object itself
assert t == TextBlock(q, id=1, type=2, parent="a")
t1 = TextBlock(q, id=1, type=2, parent="a")
t2 = TextBlock(i, id=1, type=2, text="12")
t1.relative_to(t2)
assert t2.is_in(t1)
t = TextBlock(q, score=0.2)
# Additional test for shape conversion
assert TextBlock(i, id=1, type=2,
text="12").to_interval() == TextBlock(i,
id=1,
type=2,
text="12")
assert TextBlock(i, id=1, type=2,
text="12").to_rectangle() == TextBlock(i.to_rectangle(),
id=1,
type=2,
text="12")
assert TextBlock(i, id=1, type=2,
text="12").to_quadrilateral() == TextBlock(
i.to_quadrilateral(), id=1, type=2, text="12")
assert TextBlock(r, id=1, type=2,
parent="a").to_interval(axis="x") == TextBlock(
r.to_interval(axis="x"), id=1, type=2, parent="a")
assert TextBlock(r, id=1, type=2,
parent="a").to_interval(axis="y") == TextBlock(
r.to_interval(axis="y"), id=1, type=2, parent="a")
assert TextBlock(r, id=1, type=2,
parent="a").to_rectangle() == TextBlock(r,
id=1,
type=2,
parent="a")
assert TextBlock(r, id=1, type=2,
parent="a").to_quadrilateral() == TextBlock(
r.to_quadrilateral(), id=1, type=2, parent="a")
assert TextBlock(q, id=1, type=2,
parent="a").to_interval(axis="x") == TextBlock(
q.to_interval(axis="x"), id=1, type=2, parent="a")
assert TextBlock(q, id=1, type=2,
parent="a").to_interval(axis="y") == TextBlock(
q.to_interval(axis="y"), id=1, type=2, parent="a")
assert TextBlock(q, id=1, type=2,
parent="a").to_rectangle() == TextBlock(q.to_rectangle(),
id=1,
type=2,
parent="a")
assert TextBlock(q, id=1, type=2,
parent="a").to_quadrilateral() == TextBlock(q,
id=1,
type=2,
parent="a")
with pytest.raises(ValueError):
TextBlock(q, id=1, type=2, parent="a").to_interval()
TextBlock(r, id=1, type=2, parent="a").to_interval()
def test_df():
df = pd.DataFrame(
columns=\
["_identifier", "x_1", "y_1", "x_2", "y_2", "height", "width", "p11", "p12", "p21", "p22", "p31", "p32", "p41", "p42"],
data=[
['_interval', None, 10, None, 12, 240, None, None, None, None, None, None, None, None, None ],
['_interval', 12, None, 24, None, 120, 50, None, None, None, None, None, None, None, None ],
['_interval', 0, 10, 0, 12, 120, 50, None, None, None, None, None, None, None, None ], # for fillna with 0
['_rectangle', 12, 32, 24, 55, None, None, None, None, None, None, None, None, None, None ],
['_rectangle', 12, 32, 24, 55, 0, 0, None, None, None, None, None, None, None, None ],
['_quadrilateral',None,None, None, None, None, None, 1, 2, 3, 2, 3, 6, 1, 4 ],
['_quadrilateral',None,None, None, None, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4 ],
['_quadrilateral',0, 0, 0, 0, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4 ],
]
)
layout = Layout.from_dataframe(df)
assert layout[0] == Interval(10, 12, 'y', canvas_height=240)
assert layout[2] == Interval(10,
12,
'y',
canvas_height=120,
canvas_width=50)
assert layout[3] == Rectangle(x_1=12, y_1=32, x_2=24, y_2=55)
assert layout[3] == layout[4]
assert not layout[5] == Quadrilateral(np.arange(8).reshape(4, -1))
assert layout[6] == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
df = pd.DataFrame(
columns=\
["_identifier", "x_1", "y_1", "x_2", "y_2", "height", "width", "p11", "p12", "p21", "p22", "p31", "p32", "p41", "p42", 'next', 'parent'],
data=[
['_interval', None, 10, None, 12, 240, None, None, None, None, None, None, None, None, None, None, None ],
['_interval', 12, None, 24, None, 120, 50, None, None, None, None, None, None, None, None, None, None ],
['_interval', 0, 10, 0, 12, 120, 50, None, None, None, None, None, None, None, None, None, 24 ],
# for fillna with 0
['_rectangle', 12, 32, 24, 55, None, None, None, None, None, None, None, None, None, None, None, None ],
['_rectangle', 12, 32, 24, 55, 0, 0, None, None, None, None, None, None, None, None, 12, None ],
['_quadrilateral',None,None, None, None, None, None, 1, 2, 3, 2, 3, 6, 1, 4, None, None ],
['_quadrilateral',None,None, None, None, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4, None, None ],
['_textblock', None,None, None, None, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4, None, 28 ],
]
)
layout = Layout.from_dataframe(df)
assert layout[0] == Interval(10, 12, 'y', canvas_height=240)
assert layout[2] == Interval(10,
12,
'y',
canvas_height=120,
canvas_width=50)
assert layout[3] == Rectangle(x_1=12, y_1=32, x_2=24, y_2=55)
assert layout[3] == layout[4]
assert layout[6] == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
assert layout[-1].block == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
assert layout[-1].parent == 28
df = pd.DataFrame(
columns=\
["x_1", "y_1", "x_2", "y_2", "height", "width", "p11", "p12", "p21", "p22", "p31", "p32", "p41", "p42", 'next', 'parent'],
data=[
[None, 10, None, 12, 240, None, None, None, None, None, None, None, None, None, None, None ],
[12, None, 24, None, 120, 50, None, None, None, None, None, None, None, None, None, None ],
[0, 10, 0, 12, 120, 50, None, None, None, None, None, None, None, None, None, 24 ],
# for fillna with 0
[12, 32, 24, 55, None, None, None, None, None, None, None, None, None, None, None, None ],
[12, 32, 24, 55, None, None, None, None, None, None, None, None, None, None, 12, None ],
[None, None, None, None, None, None, 1, 2, 3, 2, 3, 6, 1, 4, None, None ],
[None, None, None, None, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4, None, None ],
[None, None, None, None, 0, 0, 1, 2, 3, 2, 3, 6, 1, 4, None, 28 ],
]
)
layout = Layout.from_dataframe(df)
assert layout[0].block == Interval(10, 12, 'y', canvas_height=240)
assert layout[2].block == Interval(10,
12,
'y',
canvas_height=120,
canvas_width=50)
assert layout[3].block == Rectangle(x_1=12, y_1=32, x_2=24, y_2=55)
assert not layout[3] == layout[4]
assert layout[6].block == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
assert layout[-1].block == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
assert layout[-1].parent == 28
df = pd.DataFrame(
columns=\
["x_1", "y_1", "x_2", "y_2"],
data=[
[0, 10, 0, 12, ],
[12, 32, 24, 55, ],
])
layout = Layout.from_dataframe(df)
assert layout[1] == Rectangle(x_1=12, y_1=32, x_2=24, y_2=55)
df = pd.DataFrame(
columns=\
["x_1", "y_1", "x_2", "y_2", "height", "width"],
data=[
[0, 10, 0, 12, 240, 520 ],
[12, None, 24, None, 240, None ],
])
layout = Layout.from_dataframe(df)
assert layout[1] == Interval(12, 24, 'x', canvas_height=240)
df = pd.DataFrame(
columns=\
["p11", "p12", "p21", "p22", "p31", "p32", "p41", "p42", 'width', 'height'],
data=[
[1, 2, 3, 2, 3, 6, 1, 4, None, None ],
[1, 2, 3, 2, 3, 6, 1, 4, None, None ],
[1, 2, 3, 2, 3, 6, 1, 4, None, 28 ],
])
layout = Layout.from_dataframe(df)
assert layout[1] == Quadrilateral(
np.array([[1, 2], [3, 2], [3, 6], [1, 4]]))
assert layout[2] == Quadrilateral(np.array([[1, 2], [3, 2], [3, 6], [1,
4]]),
height=28)