def test_load_image(self):
"""
Note that pixel values may differ slightly due to the IFAST
method TensorFlow uses for decoding images.
"""
ref = imread(self.image_path)
meta = ImageMeta(self.image_path, full_image=False)
my_image = meta.load_image(None)
self.assertEqual(ref.shape, my_image.shape)
my_image = meta.load_image((None, None))
self.assertEqual(ref.shape, my_image.shape)
my_image = meta.load_image((0.5, 0.5))
shape = (ref.shape[0] / 2, ref.shape[1] / 2, 3)
self.assertEqual(shape, my_image.shape)
shape = (1000, 500)
my_image = meta.load_image(shape)
self.assertEqual(shape + (3,), my_image.shape)
my_image = meta.load_image((0.3, 400))
shape = (ref.shape[0] * 0.3, 400)
self.assertEqual(shape + (3,), my_image.shape)
my_image = meta.load_image((0.74, None))
shape = (int(ref.shape[0] * 0.74), int(ref.shape[1] * 0.74))
self.assertEqual(shape + (3,), my_image.shape)
def test_character_bounding_boxes(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
# char1
self.assertEqual(meta.char_bboxes[0].xmin, 0)
self.assertEqual(meta.char_bboxes[0].xmax, 179)
self.assertEqual(meta.char_bboxes[0].ymin, 0)
self.assertEqual(meta.char_bboxes[0].ymax, 132)
# char2
self.assertEqual(meta.char_bboxes[1].xmin, 8)
self.assertEqual(meta.char_bboxes[1].xmax, 157)
self.assertEqual(meta.char_bboxes[1].ymin, 246)
self.assertEqual(meta.char_bboxes[1].ymax, 414)
def test_line_bounding_boxes_for_full_page(self):
meta = ImageMeta(filepath=self.image_path, full_image=True)
with open(self.csv_path, 'r') as csvfile:
reader = csv.reader(csvfile)
next(reader) # header
for row in reader:
meta.add_char(Character(*row))
# line1
self.assertEqual(meta.line_bboxes[0].xmin, 2290)
self.assertEqual(meta.line_bboxes[0].xmax, 2493)
self.assertEqual(meta.line_bboxes[0].ymin, 717)
self.assertEqual(meta.line_bboxes[0].ymax, 3780)
# line2
self.assertEqual(meta.line_bboxes[1].xmin, 1931)
self.assertEqual(meta.line_bboxes[1].xmax, 2136)
self.assertEqual(meta.line_bboxes[1].ymin, 703)
self.assertEqual(meta.line_bboxes[1].ymax, 3796)
# line3
self.assertEqual(meta.line_bboxes[2].xmin, 1606)
self.assertEqual(meta.line_bboxes[2].xmax, 1811)
self.assertEqual(meta.line_bboxes[2].ymin, 715)
self.assertEqual(meta.line_bboxes[2].ymax, 3783)
# line4
self.assertEqual(meta.line_bboxes[3].xmin, 1266)
self.assertEqual(meta.line_bboxes[3].xmax, 1485)
self.assertEqual(meta.line_bboxes[3].ymin, 701)
self.assertEqual(meta.line_bboxes[3].ymax, 3320)
# line5
self.assertEqual(meta.line_bboxes[4].xmin, 940)
self.assertEqual(meta.line_bboxes[4].xmax, 1154)
self.assertEqual(meta.line_bboxes[4].ymin, 859)
self.assertEqual(meta.line_bboxes[4].ymax, 2368)
# line6
self.assertEqual(meta.line_bboxes[5].xmin, 612)
self.assertEqual(meta.line_bboxes[5].xmax, 817)
self.assertEqual(meta.line_bboxes[5].ymin, 1627)
self.assertEqual(meta.line_bboxes[5].ymax, 3583)
def test_valid_character(self):
# NOTE: Does not handle whether character is in char_set.
meta = ImageMeta(filepath=self.image_path, full_image=False,
first_char=self.char1)
self.assertFalse(meta.valid_char(Character(label='U+34cf',
image_id='wrong',
x=0, y=0, block_id='B0100',
char_id='C0001', w=0, h=0)))
self.assertTrue(meta.valid_char(self.char2, same_line=True))
other_line_char = Character('U+738B', self.image_path, x=1652, y=2092,
block_id='B0001', char_id='C0035',
w=119, h=115)
self.assertTrue(meta.valid_char(other_line_char))
self.assertFalse(meta.valid_char(other_line_char, same_line=True))
def test_character_labels(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
self.assertEqual(meta.char_labels, ['U+4E4B', 'U+6CD5'])
def test_num_characters(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
self.assertEqual(meta.num_chars, 2)
def test_get_multi_char_height(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
self.assertEqual(meta.height, 414)
def test_get_multi_char_width(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
self.assertEqual(meta.width, 179)
def test_get_multi_char_ymax(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
meta.add_char(self.char2)
self.assertEqual(meta.ymax, 963 + 168)
def test_full_height(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
self.assertEqual(meta.full_h, 4240)
def test_full_width(self):
meta = ImageMeta(filepath=self.char1.image_id, full_image=False,
first_char=self.char1)
self.assertEqual(meta.full_w, 2834)
def test_line_bounding_boxes_for_not_full_page(self):
meta = ImageMeta(filepath=self.image_path, full_image=False,
first_char=self.char1)
self.assertEqual(meta.line_bboxes, [])
