def draw_angle(image, angle, offset=(0, 0), color=(0, 0, 255), thickness=1, color2=(255, 0, 0), thickness2=1):
line0 = instantiators['line'](angle.b, angle.a)
line1 = instantiators['line'](angle.b, angle.c)
draw_line(image, line0, offset=offset, color=color, thickness=thickness)
draw_line(image, line1, offset=offset, color=color, thickness=thickness)
radius = 0.3 * min(line_length(line0), line_length(line1))
circle = instantiators['circle'](angle.b, radius)
# FIXME : this arc definition is broken. Okay for now, but needs to fix.
arc = instantiators['arc'](circle, angle.a, angle.c)
draw_arc(image, arc, offset=offset, color=color2, thickness=thickness2)
def _get_pixels_near_line(pixels, line, eps):
"""
This can be replaced with shorter, more inefficient code.
Written to boost up the speed.
:param pixels:
:param line:
:param eps:
:return:
"""
#return set(pixel for pixel in pixels if distance_between_line_and_point(line, pixel) <= eps)
p = midpoint(line.a, line.b)
u = line_unit_vector(line)
n = line_normal_vector(line)
half_length = line_length(line) / 2.0
eps_squared = eps**2
near_pixels = set()
for point in pixels:
vector = point.x - p.x, point.y - p.y
perpendicular_distance = abs(np.dot(vector, n))
if perpendicular_distance > eps:
continue
parallel_distance = abs(np.dot(vector, u))
if parallel_distance <= half_length:
near_pixels.add(point)
else:
if distance_between_points_squared(point, line.a) <= eps_squared or \
distance_between_points_squared(point, line.b) <= eps_squared:
near_pixels.add(point)
return near_pixels
def _get_pixels_near_line(pixels, line, eps):
"""
This can be replaced with shorter, more inefficient code.
Written to boost up the speed.
:param pixels:
:param line:
:param eps:
:return:
"""
#return set(pixel for pixel in pixels if distance_between_line_and_point(line, pixel) <= eps)
p = midpoint(line.a, line.b)
u = line_unit_vector(line)
n = line_normal_vector(line)
half_length = line_length(line)/2.0
eps_squared = eps**2
near_pixels = set()
for point in pixels:
vector = point.x - p.x, point.y - p.y
perpendicular_distance = abs(np.dot(vector, n))
if perpendicular_distance > eps:
continue
parallel_distance = abs(np.dot(vector, u))
if parallel_distance <= half_length:
near_pixels.add(point)
else:
if distance_between_points_squared(point, line.a) <= eps_squared or \
distance_between_points_squared(point, line.b) <= eps_squared:
near_pixels.add(point)
return near_pixels
def _line_exists(diagram_parse, line):
# TODO : smarter line_exists function needed (check continuity, etc.)
eps = LINE_EPS
multiplier = 1.0
assert isinstance(diagram_parse, CoreParse)
pixels = diagram_parse.primitive_parse.image_segment_parse.diagram_image_segment.pixels
near_pixels = set(pixel for pixel in pixels if distance_between_line_and_point(line, pixel) <= eps)
length = line_length(line)
ratio = float(len(near_pixels))/length
if ratio < multiplier:
return False
return True
def _line_exists(diagram_parse, line):
# TODO : smarter line_exists function needed (check continuity, etc.)
eps = LINE_EPS
multiplier = 1.0
assert isinstance(diagram_parse, CoreParse)
pixels = diagram_parse.primitive_parse.image_segment_parse.diagram_image_segment.pixels
near_pixels = set(pixel for pixel in pixels
if distance_between_line_and_point(line, pixel) <= eps)
length = line_length(line)
ratio = float(len(near_pixels)) / length
if ratio < multiplier:
return False
return True
def label_distance_to_line(label_point, line, is_length):
"""
minimum distance among:
end points, mid point.
:param point:
:param line:
:return:
"""
mp = midpoint(line.a, line.b)
distance = distance_between_points(label_point, mp)
if is_length:
return distance
l = 1.0/line_length(line) # To favor longer line if matching near the points
return min(distance,
distance_between_points(label_point, line.a) + l,
distance_between_points(label_point, line.b) + l)
def label_distance_to_line(label_point, line, is_length):
"""
minimum distance among:
end points, mid point.
:param point:
:param line:
:return:
"""
mp = midpoint(line.a, line.b)
distance = distance_between_points(label_point, mp)
if is_length:
return distance
l = 1.0 / line_length(
line) # To favor longer line if matching near the points
return min(distance,
distance_between_points(label_point, line.a) + l,
distance_between_points(label_point, line.b) + l)
def lengthOf(line):
return line_length(line)
def LengthOf(twod):
if isinstance(twod, instantiators['line']):
return line_length(twod)
elif isinstance(twod, instantiators['arc']):
circle, a, b = twod
return circle.radius * (b - a)
def LengthOf(line):
return line_length(line)