def __init__(self, match, feature1, feature2, detector):
self._match = match
self._feature1 = feature1
self._feature2 = feature2
self._detector = detector
self._offset1 = Point(0, 0)
self._offset2 = Point(0, 0)
self._point2_projected = None
self._included_in_transformation = True
def _calculate_image_positions(self):
""" Determine the positions of images 1 and 2 in the background image. """
pad = self._padding
w1, h1 = self._image1.size()
w2, h2 = self._image2.size()
self._image1_position = Point(pad, pad)
self._image2_position = Point(2 * pad + w1, pad)
if h2 > h1:
self._image1_position += Point(0, pad + 0.5 * (h2 - h1))
elif h2 > h1:
self._image2_position += Point(0, pad + 0.5 * (h1 - h2))
def __init__(self, image1, image2):
self._image1 = image1
self._image2 = image2
self._image1_position = Point(0, 0)
self._image2_position = Point(0, 0)
self._scale_factor = 1
self._background_image = None
self._image_size = self.DEFAULT_IMAGE_SIZE
self._padding = self.DEFAULT_PADDING
self._back_color = self.DEFAULT_BACK_COLOR
self._create_background_image()
def create_overlay_image(image1, image2, offset, rect_color=Color.black()):
""" For the two images, A and B, where the position of B is offset from that of A, overlay
image B onto image A at the appropriate position. The overlaid area will ve a blending of the
two images. A rectangle will be drawn around the area.
"""
# Make a copy of A, the background image
background = image1.copy()
# Get overlapping regions of images
overlap_a, overlap_b = Overlayer.get_overlap_regions(
image1, image2, offset)
if overlap_a is None or overlap_b is None:
return background
# Blend the two overlapping regions
perc_a, perc_b = 0.5, 0.5
blended = cv2.addWeighted(overlap_a.raw(), perc_a, overlap_b.raw(),
perc_b, 0)
background.paste(Image(blended),
Point(max(offset.x, 0), max(offset.y, 0)))
background = background.to_channels(3)
# Define the rectangle that will be pasted to the background image
w, h = image2.size()
rect = Rectangle.from_corner(offset, w, h)
background.draw_rectangle(rect, color=rect_color)
return background
def _default_alignment(self):
""" Default alignment result with 0 offset. """
translation = Point()
description = "DISABLED!"
return AlignedImages(self._image1, self._image2, self._resolution,
self._scale_factor, translation,
self._align_config, description)
def pixel_offset(self):
""" The translation (offset) in pixels - nearest whole number. """
if self._pixel_offset is None:
self._pixel_offset = Point(int(round(self._translation.x, 0)),
int(round(self._translation.y, 0)))
return self._pixel_offset
def parse_selected_points_from_args(self):
"""Parse the selected points list provided by the command line for validity and returns a list of Point objects.
:param args: Command line arguments provided by argument parser - must contain 'selected_points'
:return: List of Selected Points.
"""
log = logging.getLogger(".".join([__name__]))
log.addFilter(logconfig.ThreadContextFilter())
selected_points = []
if self.get_args().selected_points:
point_expected_format = re.compile("[0-9]+,[0-9]+")
sel_points = self.get_args().selected_points
for point_string in self.get_args().selected_points:
point_string = point_string.strip('()')
match_results = point_expected_format.match(point_string)
# Check the regex matches the entire string
# DEV NOTE: can use re.full_match in Python v3
if match_results is not None and match_results.span(
)[1] == len(point_string):
x, y = map(int, point_string.strip('()').split(','))
selected_points.append(Point(x, y))
else:
log.warning(
"Selected point with invalid format will be ignored - '"
+ point_string + "'")
return selected_points
def real_offset(self):
""" The transform in real units (um) with no rounding. """
if self._real_offset is None:
x, y = self._translation.x, self._translation.y
pixel_size = self._resolution
self._real_offset = Point(x * pixel_size, y * pixel_size)
return self._real_offset
def real_center(self):
""" The position of the center of image B (in image A coordinates) - in pixels. """
if self._real_center is None:
width, height = self.image2.size()
x, y = self._translation.x + width / 2, self._translation.y + height / 2
self._real_center = Point(x, y)
return self._real_center
def draw_text(self, text, point, color=Color.black(), centered=False, scale=1.5, thickness=3):
""" Draw the specified text on the image (in place) """
position = point
if centered:
size = cv2.getTextSize(text, cv2.FONT_HERSHEY_SIMPLEX, fontScale=scale, thickness=thickness)[0]
position = point + Point(-size[0]/2, +size[1]/2)
position = position.intify().tuple()
cv2.putText(self._img, text, position, cv2.FONT_HERSHEY_SIMPLEX, scale, color.bgra(), thickness)
def _calculate_median_translation(self, matches):
matches, mask = self._pre_filter(matches)
deltas = [m.point2() - m.point1() for m in matches]
x = -np.median([d.x for d in deltas])
y = -np.median([d.y for d in deltas])
point = Point(x, y)
transform = Translation(point)
return transform, mask
def test_find_z_level_for_point_very_close_to_image_edge(self):
img = MagicMock(get_image=Mock(return_value=np.ones((30, 30), dtype=np.float64)),
get_image_number=Mock(return_value=1),
get_image_name=Mock(return_value='test1')
)
fft_images = [img]
poi = Point(1, 1)
region_size = 10
number = PointFFTManager(fft_images, poi, region_size).find_z_level_for_point()
self.assertEqual(number, 1)
def make_search_region(self, centre_point):
""" Define a rectangle on image B in which to search for the matching crystal. Its narrow and tall
as the crystal is likely to move downwards under the effect of gravity. """
search_width, search_height = self._search_size_pixels()
vertical_shift = self._search_vertical_shift
top_left = centre_point - Point(search_width / 2,
search_height * (1 - vertical_shift))
rect = Rectangle.from_corner(top_left, search_width, search_height)
rect = rect.intersection(self._aligned_images.image2.bounds())
return rect
def test_find_z_level_for_point_returns_number_of_img_with_higier_fft(self):
img =MagicMock(get_image=Mock(return_value=np.ones((30,30),dtype=np.float64)),
get_image_number=Mock(return_value=10),
get_image_name=Mock(return_value='test1')
)
img1 = MagicMock(get_image=Mock(return_value=np.zeros((30,30),dtype=np.float64)),
get_image_number=Mock(return_value=0),
get_image_name=Mock(return_value='test2')
)
fft_images = [img, img1]
poi = Point(15,15)
region_size = 10
number = PointFFTManager(fft_images, poi, region_size).find_z_level_for_point()
self.assertEqual(number, 10)
def draw_cross(self, point, color=Color.black(), size=5, thickness=1):
""" Draw an X on the image (in place). """
self.draw_line(point - Point(size, size), point + Point(size, size), color, thickness)
self.draw_line(point + Point(size, -size), point + Point(-size, size), color, thickness)
def _np_array_to_points(np_array):
points = []
for p in np_array:
points.append(Point(p[0][0], p[0][1]))
return points
def test_crop_region_from_image_cuts_square_region_of_given_size(self):
image = np.zeros((10, 10), dtype=np.float64)
pointfft = PointFFT(Point(5, 5), image, 2)
region = pointfft.crop_region_from_image()
self.assertEqual(region.size, 4)
def bounds(self):
""" Return a rectangle that bounds the image (0,0,w,h). """
return Rectangle(Point(), Point(self.width(), self.height()))
def point(self):
""" The image coordinates of the feature. """
return Point(self._keypoint.pt[0], self._keypoint.pt[1])
