mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-27 10:26:19 +03:00
329 lines
11 KiB
Python
329 lines
11 KiB
Python
# Test the ImageMorphology functionality
|
|
from PIL import Image, ImageMorph, _imagingmorph
|
|
|
|
from .helper import PillowTestCase, hopper
|
|
|
|
|
|
class MorphTests(PillowTestCase):
|
|
def setUp(self):
|
|
self.A = self.string_to_img(
|
|
"""
|
|
.......
|
|
.......
|
|
..111..
|
|
..111..
|
|
..111..
|
|
.......
|
|
.......
|
|
"""
|
|
)
|
|
|
|
def img_to_string(self, im):
|
|
"""Turn a (small) binary image into a string representation"""
|
|
chars = ".1"
|
|
width, height = im.size
|
|
return "\n".join(
|
|
"".join(chars[im.getpixel((c, r)) > 0] for c in range(width))
|
|
for r in range(height)
|
|
)
|
|
|
|
def string_to_img(self, image_string):
|
|
"""Turn a string image representation into a binary image"""
|
|
rows = [s for s in image_string.replace(" ", "").split("\n") if len(s)]
|
|
height = len(rows)
|
|
width = len(rows[0])
|
|
im = Image.new("L", (width, height))
|
|
for i in range(width):
|
|
for j in range(height):
|
|
c = rows[j][i]
|
|
v = c in "X1"
|
|
im.putpixel((i, j), v)
|
|
|
|
return im
|
|
|
|
def img_string_normalize(self, im):
|
|
return self.img_to_string(self.string_to_img(im))
|
|
|
|
def assert_img_equal(self, A, B):
|
|
self.assertEqual(self.img_to_string(A), self.img_to_string(B))
|
|
|
|
def assert_img_equal_img_string(self, A, Bstring):
|
|
self.assertEqual(self.img_to_string(A), self.img_string_normalize(Bstring))
|
|
|
|
def test_str_to_img(self):
|
|
with Image.open("Tests/images/morph_a.png") as im:
|
|
self.assert_image_equal(self.A, im)
|
|
|
|
def create_lut(self):
|
|
for op in ("corner", "dilation4", "dilation8", "erosion4", "erosion8", "edge"):
|
|
lb = ImageMorph.LutBuilder(op_name=op)
|
|
lut = lb.build_lut()
|
|
with open("Tests/images/%s.lut" % op, "wb") as f:
|
|
f.write(lut)
|
|
|
|
# create_lut()
|
|
def test_lut(self):
|
|
for op in ("corner", "dilation4", "dilation8", "erosion4", "erosion8", "edge"):
|
|
lb = ImageMorph.LutBuilder(op_name=op)
|
|
self.assertIsNone(lb.get_lut())
|
|
|
|
lut = lb.build_lut()
|
|
with open("Tests/images/%s.lut" % op, "rb") as f:
|
|
self.assertEqual(lut, bytearray(f.read()))
|
|
|
|
def test_no_operator_loaded(self):
|
|
mop = ImageMorph.MorphOp()
|
|
with self.assertRaises(Exception) as e:
|
|
mop.apply(None)
|
|
self.assertEqual(str(e.exception), "No operator loaded")
|
|
with self.assertRaises(Exception) as e:
|
|
mop.match(None)
|
|
self.assertEqual(str(e.exception), "No operator loaded")
|
|
with self.assertRaises(Exception) as e:
|
|
mop.save_lut(None)
|
|
self.assertEqual(str(e.exception), "No operator loaded")
|
|
|
|
# Test the named patterns
|
|
def test_erosion8(self):
|
|
# erosion8
|
|
mop = ImageMorph.MorphOp(op_name="erosion8")
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 8)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.......
|
|
.......
|
|
...1...
|
|
.......
|
|
.......
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_dialation8(self):
|
|
# dialation8
|
|
mop = ImageMorph.MorphOp(op_name="dilation8")
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 16)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.11111.
|
|
.11111.
|
|
.11111.
|
|
.11111.
|
|
.11111.
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_erosion4(self):
|
|
# erosion4
|
|
mop = ImageMorph.MorphOp(op_name="dilation4")
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 12)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
..111..
|
|
.11111.
|
|
.11111.
|
|
.11111.
|
|
..111..
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_edge(self):
|
|
# edge
|
|
mop = ImageMorph.MorphOp(op_name="edge")
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 1)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.......
|
|
..111..
|
|
..1.1..
|
|
..111..
|
|
.......
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_corner(self):
|
|
# Create a corner detector pattern
|
|
mop = ImageMorph.MorphOp(patterns=["1:(... ... ...)->0", "4:(00. 01. ...)->1"])
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 5)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.......
|
|
..1.1..
|
|
.......
|
|
..1.1..
|
|
.......
|
|
.......
|
|
""",
|
|
)
|
|
|
|
# Test the coordinate counting with the same operator
|
|
coords = mop.match(self.A)
|
|
self.assertEqual(len(coords), 4)
|
|
self.assertEqual(tuple(coords), ((2, 2), (4, 2), (2, 4), (4, 4)))
|
|
|
|
coords = mop.get_on_pixels(Aout)
|
|
self.assertEqual(len(coords), 4)
|
|
self.assertEqual(tuple(coords), ((2, 2), (4, 2), (2, 4), (4, 4)))
|
|
|
|
def test_mirroring(self):
|
|
# Test 'M' for mirroring
|
|
mop = ImageMorph.MorphOp(patterns=["1:(... ... ...)->0", "M:(00. 01. ...)->1"])
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 7)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.......
|
|
..1.1..
|
|
.......
|
|
.......
|
|
.......
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_negate(self):
|
|
# Test 'N' for negate
|
|
mop = ImageMorph.MorphOp(patterns=["1:(... ... ...)->0", "N:(00. 01. ...)->1"])
|
|
count, Aout = mop.apply(self.A)
|
|
self.assertEqual(count, 8)
|
|
self.assert_img_equal_img_string(
|
|
Aout,
|
|
"""
|
|
.......
|
|
.......
|
|
..1....
|
|
.......
|
|
.......
|
|
.......
|
|
.......
|
|
""",
|
|
)
|
|
|
|
def test_non_binary_images(self):
|
|
im = hopper("RGB")
|
|
mop = ImageMorph.MorphOp(op_name="erosion8")
|
|
|
|
with self.assertRaises(Exception) as e:
|
|
mop.apply(im)
|
|
self.assertEqual(
|
|
str(e.exception), "Image must be binary, meaning it must use mode L"
|
|
)
|
|
with self.assertRaises(Exception) as e:
|
|
mop.match(im)
|
|
self.assertEqual(
|
|
str(e.exception), "Image must be binary, meaning it must use mode L"
|
|
)
|
|
with self.assertRaises(Exception) as e:
|
|
mop.get_on_pixels(im)
|
|
self.assertEqual(
|
|
str(e.exception), "Image must be binary, meaning it must use mode L"
|
|
)
|
|
|
|
def test_add_patterns(self):
|
|
# Arrange
|
|
lb = ImageMorph.LutBuilder(op_name="corner")
|
|
self.assertEqual(lb.patterns, ["1:(... ... ...)->0", "4:(00. 01. ...)->1"])
|
|
new_patterns = ["M:(00. 01. ...)->1", "N:(00. 01. ...)->1"]
|
|
|
|
# Act
|
|
lb.add_patterns(new_patterns)
|
|
|
|
# Assert
|
|
self.assertEqual(
|
|
lb.patterns,
|
|
[
|
|
"1:(... ... ...)->0",
|
|
"4:(00. 01. ...)->1",
|
|
"M:(00. 01. ...)->1",
|
|
"N:(00. 01. ...)->1",
|
|
],
|
|
)
|
|
|
|
def test_unknown_pattern(self):
|
|
self.assertRaises(Exception, ImageMorph.LutBuilder, op_name="unknown")
|
|
|
|
def test_pattern_syntax_error(self):
|
|
# Arrange
|
|
lb = ImageMorph.LutBuilder(op_name="corner")
|
|
new_patterns = ["a pattern with a syntax error"]
|
|
lb.add_patterns(new_patterns)
|
|
|
|
# Act / Assert
|
|
with self.assertRaises(Exception) as e:
|
|
lb.build_lut()
|
|
self.assertEqual(
|
|
str(e.exception), 'Syntax error in pattern "a pattern with a syntax error"'
|
|
)
|
|
|
|
def test_load_invalid_mrl(self):
|
|
# Arrange
|
|
invalid_mrl = "Tests/images/hopper.png"
|
|
mop = ImageMorph.MorphOp()
|
|
|
|
# Act / Assert
|
|
with self.assertRaises(Exception) as e:
|
|
mop.load_lut(invalid_mrl)
|
|
self.assertEqual(str(e.exception), "Wrong size operator file!")
|
|
|
|
def test_roundtrip_mrl(self):
|
|
# Arrange
|
|
tempfile = self.tempfile("temp.mrl")
|
|
mop = ImageMorph.MorphOp(op_name="corner")
|
|
initial_lut = mop.lut
|
|
|
|
# Act
|
|
mop.save_lut(tempfile)
|
|
mop.load_lut(tempfile)
|
|
|
|
# Act / Assert
|
|
self.assertEqual(mop.lut, initial_lut)
|
|
|
|
def test_set_lut(self):
|
|
# Arrange
|
|
lb = ImageMorph.LutBuilder(op_name="corner")
|
|
lut = lb.build_lut()
|
|
mop = ImageMorph.MorphOp()
|
|
|
|
# Act
|
|
mop.set_lut(lut)
|
|
|
|
# Assert
|
|
self.assertEqual(mop.lut, lut)
|
|
|
|
def test_wrong_mode(self):
|
|
lut = ImageMorph.LutBuilder(op_name="corner").build_lut()
|
|
imrgb = Image.new("RGB", (10, 10))
|
|
iml = Image.new("L", (10, 10))
|
|
|
|
with self.assertRaises(RuntimeError):
|
|
_imagingmorph.apply(bytes(lut), imrgb.im.id, iml.im.id)
|
|
|
|
with self.assertRaises(RuntimeError):
|
|
_imagingmorph.apply(bytes(lut), iml.im.id, imrgb.im.id)
|
|
|
|
with self.assertRaises(RuntimeError):
|
|
_imagingmorph.match(bytes(lut), imrgb.im.id)
|
|
|
|
# Should not raise
|
|
_imagingmorph.match(bytes(lut), iml.im.id)
|