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test_line_counter.py
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from contextlib import ExitStack as DoesNotRaise
from typing import List, Optional, Tuple
import pytest
from supervision import LineZone
from supervision.geometry.core import Point, Position, Vector
from test.test_utils import mock_detections
@pytest.mark.parametrize(
"vector, expected_result, exception",
[
(
Vector(start=Point(x=0.0, y=0.0), end=Point(x=0.0, y=0.0)),
None,
pytest.raises(ValueError),
),
(
Vector(start=Point(x=1.0, y=1.0), end=Point(x=1.0, y=1.0)),
None,
pytest.raises(ValueError),
),
(
Vector(start=Point(x=0.0, y=0.0), end=Point(x=0.0, y=4.0)),
(
Vector(start=Point(x=0.0, y=0.0), end=Point(x=-1.0, y=0.0)),
Vector(start=Point(x=0.0, y=4.0), end=Point(x=1.0, y=4.0)),
),
DoesNotRaise(),
),
(
Vector(Point(0.0, 0.0), Point(4.0, 0.0)),
(
Vector(start=Point(x=0.0, y=0.0), end=Point(x=0.0, y=1.0)),
Vector(start=Point(x=4.0, y=0.0), end=Point(x=4.0, y=-1.0)),
),
DoesNotRaise(),
),
(
Vector(Point(0.0, 0.0), Point(3.0, 4.0)),
(
Vector(start=Point(x=0, y=0), end=Point(x=-0.8, y=0.6)),
Vector(start=Point(x=3, y=4), end=Point(x=3.8, y=3.4)),
),
DoesNotRaise(),
),
(
Vector(Point(0.0, 0.0), Point(4.0, 3.0)),
(
Vector(start=Point(x=0, y=0), end=Point(x=-0.6, y=0.8)),
Vector(start=Point(x=4, y=3), end=Point(x=4.6, y=2.2)),
),
DoesNotRaise(),
),
(
Vector(Point(0.0, 0.0), Point(3.0, -4.0)),
(
Vector(start=Point(x=0, y=0), end=Point(x=0.8, y=0.6)),
Vector(start=Point(x=3, y=-4), end=Point(x=2.2, y=-4.6)),
),
DoesNotRaise(),
),
],
)
def test_calculate_region_of_interest_limits(
vector: Vector,
expected_result: Optional[Tuple[Vector, Vector]],
exception: Exception,
) -> None:
with exception:
result = LineZone._calculate_region_of_interest_limits(vector=vector)
assert result == expected_result
@pytest.mark.parametrize(
"vector, xyxy_sequence, expected_crossed_in, expected_crossed_out",
[
( # Vertical line, simple crossing
Vector(Point(0, 0), Point(0, 10)),
[
[4, 4, 6, 6],
[4 - 10, 4, 6 - 10, 6],
[4, 4, 6, 6],
[4 - 10, 4, 6 - 10, 6],
],
[False, False, True, False],
[False, True, False, True],
),
( # Vertical line reversed, simple crossing
Vector(Point(0, 10), Point(0, 0)),
[
[4, 4, 6, 6],
[4 - 10, 4, 6 - 10, 6],
[4, 4, 6, 6],
[4 - 10, 4, 6 - 10, 6],
],
[False, True, False, True],
[False, False, True, False],
),
( # Horizontal line, simple crossing
Vector(Point(0, 0), Point(10, 0)),
[
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
],
[False, True, False, True],
[False, False, True, False],
),
( # Horizontal line reversed, simple crossing
Vector(Point(10, 0), Point(0, 0)),
[
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
],
[False, False, True, False],
[False, True, False, True],
),
( # Diagonal line, simple crossing
Vector(Point(5, 0), Point(0, 5)),
[
[0, 0, 2, 2],
[0 + 10, 0 + 10, 2 + 10, 2 + 10],
[0, 0, 2, 2],
[0 + 10, 0 + 10, 2 + 10, 2 + 10],
],
[False, True, False, True],
[False, False, True, False],
),
( # Crossing beside - right side
Vector(Point(0, 0), Point(10, 0)),
[
[20, 4, 24, 6],
[20, 4 - 10, 24, 6 - 10],
[20, 4, 24, 6],
[20, 4 - 10, 24, 6 - 10],
],
[False, False, False, False],
[False, False, False, False],
),
( # Horizontal line, simple crossing, far away
Vector(Point(0, 0), Point(10, 0)),
[
[4, 1e32, 6, 1e32 + 2],
[4, -1e32, 6, -1e32 + 2],
[4, 1e32, 6, 1e32 + 2],
[4, -1e32, 6, -1e32 + 2],
],
[False, True, False, True],
[False, False, True, False],
),
( # Crossing beside - left side
Vector(Point(0, 0), Point(10, 0)),
[
[-20, 4, -24, 6],
[-20, 4 - 10, -24, 6 - 10],
[-20, 4, -24, 6],
[-20, 4 - 10, -24, 6 - 10],
],
[False, False, False, False],
[False, False, False, False],
),
( # Move above
Vector(Point(0, 0), Point(10, 0)),
[
[-4, 4, -2, 6],
[-4 + 20, 4, -2 + 20, 6],
[-4, 4, -2, 6],
[-4 + 20, 4, -2 + 20, 6],
],
[False, False, False, False],
[False, False, False, False],
),
( # Move below
Vector(Point(0, 0), Point(10, 0)),
[
[-4, -6, -2, -4],
[-4 + 20, -6, -2 + 20, -4],
[-4, -6, -2, -4],
[-4 + 20, -6, -2 + 20, -4],
],
[False, False, False, False],
[False, False, False, False],
),
( # Move into line partway
Vector(Point(0, 0), Point(10, 0)),
[
[4, 4, 6, 6],
[4 + 5, 4, 6 + 5, 6],
[4, 4, 6, 6],
[4 + 5, 4, 6 + 5, 6],
],
[False, False, False, False],
[False, False, False, False],
),
( # V-shaped crossing from outside limits - not supported.
Vector(Point(0, 0), Point(10, 0)),
[[-3, 6, -1, 8], [4, -6, 6, -4], [11, 6, 13, 8]],
[False, False, False],
[False, False, False],
),
( # Diagonal movement, from within limits to outside - not supported
Vector(Point(0, 0), Point(10, 0)),
[[4, 1, 6, 3], [11, 1 - 20, 13, 3 - 20]],
[False, False],
[False, False],
),
( # Diagonal movement, from outside limits to within - not supported
Vector(Point(0, 0), Point(10, 0)),
[
[11, 21, 13, 23],
[4, -3, 6, -1],
],
[False, False],
[False, False],
),
( # Diagonal crossing, from outside to outside limits - not supported.
Vector(Point(0, 0), Point(10, 0)),
[
[-4, 4, -2, 8],
[-4 + 16, -4, -2 + 16, -6],
[-4, 4, -2, 8],
[-4 + 16, -4, -2 + 16, -6],
],
[False, False, False, False],
[False, False, False, False],
),
],
)
def test_line_zone_one_detection_default_anchors(
vector: Vector,
xyxy_sequence: List[List[float]],
expected_crossed_in: List[bool],
expected_crossed_out: List[bool],
) -> None:
line_zone = LineZone(start=vector.start, end=vector.end)
crossed_in_list = []
crossed_out_list = []
for i, bbox in enumerate(xyxy_sequence):
detections = mock_detections(
xyxy=[bbox],
tracker_id=[0],
)
crossed_in, crossed_out = line_zone.trigger(detections)
crossed_in_list.append(crossed_in[0])
crossed_out_list.append(crossed_out[0])
assert crossed_in_list == expected_crossed_in, (
f"expected {expected_crossed_in}, got {crossed_in_list}"
)
assert crossed_out_list == expected_crossed_out, (
f"expected {expected_crossed_out}, got {crossed_out_list}"
)
@pytest.mark.parametrize(
"vector, xyxy_sequence, triggering_anchors, expected_crossed_in, "
"expected_crossed_out",
[
( # Scrape line, left side, corner anchors
Vector(Point(0, 0), Point(10, 0)),
[
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
],
[
Position.TOP_LEFT,
Position.BOTTOM_LEFT,
Position.TOP_RIGHT,
Position.BOTTOM_RIGHT,
],
[False, False, False, False],
[False, False, False, False],
),
( # Scrape line, left side, right anchors
Vector(Point(0, 0), Point(10, 0)),
[
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
],
[Position.TOP_RIGHT, Position.BOTTOM_RIGHT],
[False, True, False, True],
[False, False, True, False],
),
( # Scrape line, left side, center anchor (along line point)
Vector(Point(0, 0), Point(10, 0)),
[
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
],
[Position.CENTER],
[False, True, False, True],
[False, False, True, False],
),
( # Scrape line, left side, center anchor (along line point)
Vector(Point(0, 0), Point(10, 0)),
[
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
[-2, 4, 2, 6],
[-2, 4 - 10, 2, 6 - 10],
[-2, 4 - 10, 2, 6 - 10],
],
[Position.CENTER],
[False, True, False, True, False],
[False, False, True, False, False],
),
( # Scrape line, right side, corner anchors
Vector(Point(0, 0), Point(10, 0)),
[
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
],
[
Position.TOP_LEFT,
Position.BOTTOM_LEFT,
Position.TOP_RIGHT,
Position.BOTTOM_RIGHT,
],
[False, False, False, False],
[False, False, False, False],
),
( # Scrape line, right side, left anchors
Vector(Point(0, 0), Point(10, 0)),
[
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
],
[Position.TOP_LEFT, Position.BOTTOM_LEFT],
[False, True, False, True],
[False, False, True, False],
),
( # Scrape line, right side, center anchor (along line point)
Vector(Point(0, 0), Point(10, 0)),
[
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
[8, 4, 12, 6],
[8, 4 - 10, 12, 6 - 10],
],
[Position.CENTER],
[False, True, False, True],
[False, False, True, False],
),
( # Simple crossing, one anchor
Vector(Point(0, 0), Point(10, 0)),
[
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
],
[Position.CENTER],
[False, True, False, True],
[False, False, True, False],
),
( # Simple crossing, all box anchors
Vector(Point(0, 0), Point(10, 0)),
[
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
[4, 4, 6, 6],
[4, 4 - 10, 6, 6 - 10],
],
[
Position.CENTER,
Position.CENTER_LEFT,
Position.CENTER_RIGHT,
Position.TOP_CENTER,
Position.TOP_LEFT,
Position.TOP_RIGHT,
Position.BOTTOM_LEFT,
Position.BOTTOM_CENTER,
Position.BOTTOM_RIGHT,
],
[False, True, False, True],
[False, False, True, False],
),
],
)
def test_line_zone_one_detection(
vector: Vector,
xyxy_sequence: List[List[float]],
triggering_anchors: List[Position],
expected_crossed_in: List[bool],
expected_crossed_out: List[bool],
) -> None:
line_zone = LineZone(
start=vector.start, end=vector.end, triggering_anchors=triggering_anchors
)
crossed_in_list = []
crossed_out_list = []
for i, bbox in enumerate(xyxy_sequence):
detections = mock_detections(
xyxy=[bbox],
tracker_id=[0],
)
crossed_in, crossed_out = line_zone.trigger(detections)
crossed_in_list.append(crossed_in[0])
crossed_out_list.append(crossed_out[0])
assert crossed_in_list == expected_crossed_in, (
f"expected {expected_crossed_in}, got {crossed_in_list}"
)
assert crossed_out_list == expected_crossed_out, (
f"expected {expected_crossed_out}, got {crossed_out_list}"
)
@pytest.mark.parametrize(
"vector, xyxy_sequence, anchors, expected_crossed_in, "
"expected_crossed_out, exception",
[
( # One stays, one crosses
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
Position.TOP_RIGHT,
Position.BOTTOM_LEFT,
Position.BOTTOM_RIGHT,
],
[[False, False], [False, True], [False, False], [False, True]],
[[False, False], [False, False], [False, True], [False, False]],
DoesNotRaise(),
),
( # Both cross at the same time
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4 - 10, 6, 6 - 10], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4 - 10, 6, 6 - 10], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
Position.TOP_RIGHT,
Position.BOTTOM_LEFT,
Position.BOTTOM_RIGHT,
],
[[False, False], [True, True], [False, False], [True, True]],
[[False, False], [False, False], [True, True], [False, False]],
DoesNotRaise(),
),
],
)
def test_line_zone_multiple_detections(
vector: Vector,
xyxy_sequence: List[List[List[float]]],
anchors: List[Position],
expected_crossed_in: List[List[bool]],
expected_crossed_out: List[List[bool]],
exception: Exception,
) -> None:
with exception:
line_zone = LineZone(
start=vector.start, end=vector.end, triggering_anchors=anchors
)
crossed_in_list = []
crossed_out_list = []
for bboxes in xyxy_sequence:
detections = mock_detections(
xyxy=bboxes,
tracker_id=[i for i in range(0, len(bboxes))],
)
crossed_in, crossed_out = line_zone.trigger(detections)
crossed_in_list.append(list(crossed_in))
crossed_out_list.append(list(crossed_out))
assert crossed_in_list == expected_crossed_in
assert crossed_out_list == expected_crossed_out
@pytest.mark.parametrize(
"vector, xyxy_sequence, triggering_anchors, minimum_crossing_threshold, "
"expected_crossed_in, expected_crossed_out",
[
( # Detection lingers around line, all crosses counted
Vector(Point(0, 0), Point(10, 0)),
[
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
],
[
Position.TOP_LEFT,
],
1,
[False, True, False, True, False],
[False, False, True, False, False],
),
( # Detection lingers around line, only final cross counted
Vector(Point(0, 0), Point(10, 0)),
[
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
],
[
Position.TOP_LEFT,
],
2,
[False, False, False, False, True],
[False, False, False, False, False],
),
( # Detection lingers around line for a long time
Vector(Point(0, 0), Point(10, 0)),
[
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
],
[
Position.TOP_LEFT,
],
2,
[False] * 12 + [True],
[False] * 13,
),
( # Detection lingers around line, longer cycle
Vector(Point(0, 0), Point(10, 0)),
[
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4, 3, 6],
[2, 4, 3, 6],
[2, 4, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
[2, 4 - 10, 3, 6],
],
[
Position.TOP_LEFT,
],
4,
[False] * 8 + [True],
[False] * 9,
),
],
)
def test_line_zone_one_detection_long_horizon(
vector: Vector,
xyxy_sequence: List[List[float]],
triggering_anchors: List[Position],
minimum_crossing_threshold: int,
expected_crossed_in: List[bool],
expected_crossed_out: List[bool],
) -> None:
line_zone = LineZone(
start=vector.start,
end=vector.end,
triggering_anchors=triggering_anchors,
minimum_crossing_threshold=minimum_crossing_threshold,
)
crossed_in_list = []
crossed_out_list = []
for i, bbox in enumerate(xyxy_sequence):
detections = mock_detections(
xyxy=[bbox],
tracker_id=[0],
)
crossed_in, crossed_out = line_zone.trigger(detections)
crossed_in_list.append(crossed_in[0])
crossed_out_list.append(crossed_out[0])
assert crossed_in_list == expected_crossed_in, (
f"expected {expected_crossed_in}, got {crossed_in_list}"
)
assert crossed_out_list == expected_crossed_out, (
f"expected {expected_crossed_out}, got {crossed_out_list}"
)
@pytest.mark.parametrize(
"vector, xyxy_sequence, anchors, minimum_crossing_threshold, "
"expected_crossed_in, expected_crossed_out, expected_count_in, "
"expected_count_out, exception",
[
( # One stays, one crosses, one disappears before crossing
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
],
1,
[
[False, False, False],
[False, True, False],
[False, False],
[False, True],
[False, False],
],
[
[False, False, False],
[False, False, False],
[False, True],
[False, False],
[False, False],
],
[0, 1, 1, 2, 2],
[0, 0, 1, 1, 1],
DoesNotRaise(),
),
( # One stays, one crosses, one disappears immediately after crossing
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
],
1,
[
[False, False, False],
[False, True, False],
[False, False, True],
[False, True],
[False, False],
],
[
[False, False, False],
[False, False, False],
[False, True, False],
[False, False],
[False, False],
],
[0, 1, 2, 3, 3],
[0, 0, 1, 1, 1],
DoesNotRaise(),
),
( # One stays, one crosses, one disappears before crossing
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
],
2,
[
[False, False, False],
[False, False, False],
[False, False],
[False, False],
[False, True],
],
[
[False, False, False],
[False, False, False],
[False, False],
[False, False],
[False, False],
],
[0, 0, 0, 0, 1],
[0, 0, 0, 0, 0],
DoesNotRaise(),
),
( # One stays, one crosses, one disappears immediately after crossing
Vector(Point(0, 0), Point(10, 0)),
[
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10], [4, 4, 6, 6]],
[[4, 4, 6, 6], [4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
[[4, 4, 6, 6], [4, 4 - 10, 6, 6 - 10]],
],
[
Position.TOP_LEFT,
],
2,
[
[False, False, False],
[False, False, False],
[False, False, False],
[False, False],
[False, True],
],
[
[False, False, False],
[False, False, False],
[False, False, False],
[False, False],
[False, False],
],
[0, 0, 0, 0, 1],
[0, 0, 0, 0, 0],
DoesNotRaise(),
),
],
)
def test_line_zone_long_horizon_disappearing_detections(
vector: Vector,
xyxy_sequence: List[List[Optional[List[float]]]],
anchors: List[Position],
minimum_crossing_threshold: int,
expected_crossed_in: List[List[bool]],
expected_crossed_out: List[List[bool]],
expected_count_in: List[int],
expected_count_out: List[int],
exception: Exception,
) -> None:
with exception:
line_zone = LineZone(
start=vector.start,
end=vector.end,
triggering_anchors=anchors,
minimum_crossing_threshold=minimum_crossing_threshold,
)
crossed_in_list = []
crossed_out_list = []
count_in_list = []
count_out_list = []
for bboxes in xyxy_sequence:
detections = mock_detections(
xyxy=bboxes,
tracker_id=[i for i in range(0, len(bboxes))],
)
crossed_in, crossed_out = line_zone.trigger(detections)
crossed_in_list.append(list(crossed_in))
crossed_out_list.append(list(crossed_out))
count_in_list.append(line_zone.in_count)
count_out_list.append(line_zone.out_count)
assert crossed_in_list == expected_crossed_in
assert crossed_out_list == expected_crossed_out
assert count_in_list == expected_count_in
assert count_out_list == expected_count_out