mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-12-27 10:26:19 +03:00
4de5477b61
With the introduction and use of pytest, it is simple and easy to
execute specific tests in isolation through documented command line
arguments. Either by specifying the module path or through the `-k
EXPRESSION` argument. There is no longer any need to provide the
boilerplate:
if __name__ == '__main__':
unittest.main()
To every test file. It is simply noise.
The pattern remains in test files that aren't named with `test_*` as
those files are not discovered and executed by pytest by default.
324 lines
11 KiB
Python
324 lines
11 KiB
Python
# Test the ImageMorphology functionality
|
|
from .helper import PillowTestCase, hopper
|
|
|
|
from PIL import Image, ImageMorph, _imagingmorph
|
|
|
|
|
|
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):
|
|
im = Image.open('Tests/images/morph_a.png')
|
|
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)
|