mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-10 19:56:47 +03:00
273 lines
6.9 KiB
Python
273 lines
6.9 KiB
Python
from __future__ import annotations
|
|
|
|
import pytest
|
|
|
|
from PIL import Image, ImageFilter
|
|
|
|
sample = Image.new("L", (7, 5))
|
|
# fmt: off
|
|
sample.putdata(sum([
|
|
[210, 50, 20, 10, 220, 230, 80],
|
|
[190, 210, 20, 180, 170, 40, 110],
|
|
[120, 210, 250, 60, 220, 0, 220],
|
|
[220, 40, 230, 80, 130, 250, 40],
|
|
[250, 0, 80, 30, 60, 20, 110],
|
|
], []))
|
|
# fmt: on
|
|
|
|
|
|
def test_imageops_box_blur() -> None:
|
|
i = sample.filter(ImageFilter.BoxBlur(1))
|
|
assert i.mode == sample.mode
|
|
assert i.size == sample.size
|
|
assert isinstance(i, Image.Image)
|
|
|
|
|
|
def box_blur(image: Image.Image, radius: float = 1, n: int = 1) -> Image.Image:
|
|
return image._new(image.im.box_blur((radius, radius), n))
|
|
|
|
|
|
def assert_image(im: Image.Image, data: list[list[int]], delta: int = 0) -> None:
|
|
it = iter(im.getdata())
|
|
for data_row in data:
|
|
im_row = [next(it) for _ in range(im.size[0])]
|
|
if any(abs(data_v - im_v) > delta for data_v, im_v in zip(data_row, im_row)):
|
|
assert im_row == data_row
|
|
with pytest.raises(StopIteration):
|
|
next(it)
|
|
|
|
|
|
def assert_blur(
|
|
im: Image.Image,
|
|
radius: float,
|
|
data: list[list[int]],
|
|
passes: int = 1,
|
|
delta: int = 0,
|
|
) -> None:
|
|
# check grayscale image
|
|
assert_image(box_blur(im, radius, passes), data, delta)
|
|
rgba = Image.merge("RGBA", (im, im, im, im))
|
|
for band in box_blur(rgba, radius, passes).split():
|
|
assert_image(band, data, delta)
|
|
|
|
|
|
def test_color_modes() -> None:
|
|
with pytest.raises(ValueError):
|
|
box_blur(sample.convert("1"))
|
|
with pytest.raises(ValueError):
|
|
box_blur(sample.convert("P"))
|
|
box_blur(sample.convert("L"))
|
|
box_blur(sample.convert("LA"))
|
|
box_blur(sample.convert("LA").convert("La"))
|
|
with pytest.raises(ValueError):
|
|
box_blur(sample.convert("I"))
|
|
with pytest.raises(ValueError):
|
|
box_blur(sample.convert("F"))
|
|
box_blur(sample.convert("RGB"))
|
|
box_blur(sample.convert("RGBA"))
|
|
box_blur(sample.convert("RGBA").convert("RGBa"))
|
|
box_blur(sample.convert("CMYK"))
|
|
with pytest.raises(ValueError):
|
|
box_blur(sample.convert("YCbCr"))
|
|
|
|
|
|
def test_radius_0() -> None:
|
|
assert_blur(
|
|
sample,
|
|
0,
|
|
[
|
|
# fmt: off
|
|
[210, 50, 20, 10, 220, 230, 80],
|
|
[190, 210, 20, 180, 170, 40, 110],
|
|
[120, 210, 250, 60, 220, 0, 220],
|
|
[220, 40, 230, 80, 130, 250, 40],
|
|
[250, 0, 80, 30, 60, 20, 110],
|
|
# fmt: on
|
|
],
|
|
)
|
|
|
|
|
|
def test_radius_0_02() -> None:
|
|
assert_blur(
|
|
sample,
|
|
0.02,
|
|
[
|
|
# fmt: off
|
|
[206, 55, 20, 17, 215, 223, 83],
|
|
[189, 203, 31, 171, 169, 46, 110],
|
|
[125, 206, 241, 69, 210, 13, 210],
|
|
[215, 49, 221, 82, 131, 235, 48],
|
|
[244, 7, 80, 32, 60, 27, 107],
|
|
# fmt: on
|
|
],
|
|
delta=2,
|
|
)
|
|
|
|
|
|
def test_radius_0_05() -> None:
|
|
assert_blur(
|
|
sample,
|
|
0.05,
|
|
[
|
|
# fmt: off
|
|
[202, 62, 22, 27, 209, 215, 88],
|
|
[188, 194, 44, 161, 168, 56, 111],
|
|
[131, 201, 229, 81, 198, 31, 198],
|
|
[209, 62, 209, 86, 133, 216, 59],
|
|
[237, 17, 80, 36, 60, 35, 103],
|
|
# fmt: on
|
|
],
|
|
delta=2,
|
|
)
|
|
|
|
|
|
def test_radius_0_1() -> None:
|
|
assert_blur(
|
|
sample,
|
|
0.1,
|
|
[
|
|
# fmt: off
|
|
[196, 72, 24, 40, 200, 203, 93],
|
|
[187, 183, 62, 148, 166, 68, 111],
|
|
[139, 193, 213, 96, 182, 54, 182],
|
|
[201, 78, 193, 91, 133, 191, 73],
|
|
[227, 31, 80, 42, 61, 47, 99],
|
|
# fmt: on
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_radius_0_5() -> None:
|
|
assert_blur(
|
|
sample,
|
|
0.5,
|
|
[
|
|
# fmt: off
|
|
[176, 101, 46, 83, 163, 165, 111],
|
|
[176, 149, 108, 122, 144, 120, 117],
|
|
[164, 171, 159, 141, 134, 119, 129],
|
|
[170, 136, 133, 114, 116, 124, 109],
|
|
[184, 95, 72, 70, 69, 81, 89],
|
|
# fmt: on
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_radius_1() -> None:
|
|
assert_blur(
|
|
sample,
|
|
1,
|
|
[
|
|
# fmt: off
|
|
[170, 109, 63, 97, 146, 153, 116],
|
|
[168, 142, 112, 128, 126, 143, 121],
|
|
[169, 166, 142, 149, 126, 131, 114],
|
|
[159, 156, 109, 127, 94, 117, 112],
|
|
[164, 128, 63, 87, 76, 89, 90],
|
|
# fmt: on
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_radius_1_5() -> None:
|
|
assert_blur(
|
|
sample,
|
|
1.5,
|
|
[
|
|
# fmt: off
|
|
[155, 120, 105, 112, 124, 137, 130],
|
|
[160, 136, 124, 125, 127, 134, 130],
|
|
[166, 147, 130, 125, 120, 121, 119],
|
|
[168, 145, 119, 109, 103, 105, 110],
|
|
[168, 134, 96, 85, 85, 89, 97],
|
|
# fmt: on
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_radius_bigger_then_half() -> None:
|
|
assert_blur(
|
|
sample,
|
|
3,
|
|
[
|
|
# fmt: off
|
|
[144, 145, 142, 128, 114, 115, 117],
|
|
[148, 145, 137, 122, 109, 111, 112],
|
|
[152, 145, 131, 117, 103, 107, 108],
|
|
[156, 144, 126, 111, 97, 102, 103],
|
|
[160, 144, 121, 106, 92, 98, 99],
|
|
# fmt: on
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_radius_bigger_then_width() -> None:
|
|
assert_blur(
|
|
sample,
|
|
10,
|
|
[
|
|
[158, 153, 147, 141, 135, 129, 123],
|
|
[159, 153, 147, 141, 136, 130, 124],
|
|
[159, 154, 148, 142, 136, 130, 124],
|
|
[160, 154, 148, 142, 137, 131, 125],
|
|
[160, 155, 149, 143, 137, 131, 125],
|
|
],
|
|
delta=0,
|
|
)
|
|
|
|
|
|
def test_extreme_large_radius() -> None:
|
|
assert_blur(
|
|
sample,
|
|
600,
|
|
[
|
|
[162, 162, 162, 162, 162, 162, 162],
|
|
[162, 162, 162, 162, 162, 162, 162],
|
|
[162, 162, 162, 162, 162, 162, 162],
|
|
[162, 162, 162, 162, 162, 162, 162],
|
|
[162, 162, 162, 162, 162, 162, 162],
|
|
],
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_two_passes() -> None:
|
|
assert_blur(
|
|
sample,
|
|
1,
|
|
[
|
|
# fmt: off
|
|
[153, 123, 102, 109, 132, 135, 129],
|
|
[159, 138, 123, 121, 133, 131, 126],
|
|
[162, 147, 136, 124, 127, 121, 121],
|
|
[159, 140, 125, 108, 111, 106, 108],
|
|
[154, 126, 105, 87, 94, 93, 97],
|
|
# fmt: on
|
|
],
|
|
passes=2,
|
|
delta=1,
|
|
)
|
|
|
|
|
|
def test_three_passes() -> None:
|
|
assert_blur(
|
|
sample,
|
|
1,
|
|
[
|
|
# fmt: off
|
|
[146, 131, 116, 118, 126, 131, 130],
|
|
[151, 138, 125, 123, 126, 128, 127],
|
|
[154, 143, 129, 123, 120, 120, 119],
|
|
[152, 139, 122, 113, 108, 108, 108],
|
|
[148, 132, 112, 102, 97, 99, 100],
|
|
# fmt: on
|
|
],
|
|
passes=3,
|
|
delta=1,
|
|
)
|