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 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)
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_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_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')
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_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_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_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_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_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_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_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_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_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)