1 import Image, ImageDraw, ImageFilter
3 from manual import lines as g_grid, l2ad, intersection, line as g_line
4 from intrsc import intersections_from_angl_dist
5 from linef import line_from_angl_dist
8 class GridFittingFailedError(Exception):
11 class MyGaussianBlur(ImageFilter.Filter):
14 def __init__(self, radius=2):
16 def filter(self, image):
17 return image.gaussian_blur(self.radius)
20 def __init__(self, x, y):
24 def __add__(self, other):
25 return V(self.x + other.x, self.y + other.y)
27 def __sub__(self, other):
28 return V(self.x - other.x, self.y - other.y)
30 def __rmul__(self, other):
31 return V(other * self.x, other * self.y)
34 return (self.x, self.y)
37 return V(-self.y, self.x)
39 def projection(point, line, vector):
41 l2 = g_line(point.t(), (point + n).t())
42 return V(*intersection(l2, g_line(*line)))
44 def error_surface(lines, a, b, c, d, hough, size, v1):
45 import matplotlib.pyplot as plt
46 from matplotlib import cm
54 for i in range(-k, k):
55 X.append(range(-k, k))
59 for x in range(0, 2*k):
61 Z.append([distance(lines, get_grid(a + X[x][y] * s * v1, b + Y[x][y] * s * v1,
63 size) for y in range(0, 2* k)])
66 o = ((time.time() - start) * (2 * k - (x + 1))) / (60 * (x + 1))
67 print x + 1, "{0} h {1:2.2f} m".format(int(o) / 60, o % 60)
68 s_file = open('surface' + str(k), 'w')
69 pickle.dump((X, Y, Z), s_file)
71 plt.imshow(Z, cmap=cm.gnuplot2, interpolation='bicubic',
72 origin='upper', extent=(-k, k, -k, k), aspect='equal')
77 def find(lines, size, l1, l2, bounds, hough, do_something):
78 a, b, c, d = [V(*a) for a in bounds]
79 l1 = line_from_angl_dist(l1, size)
80 l2 = line_from_angl_dist(l2, size)
81 v1 = V(*l1[0]) - V(*l1[1])
82 v2 = V(*l2[0]) - V(*l2[1])
83 a = projection(a, l1, v1)
84 b = projection(b, l1, v1)
85 c = projection(c, l2, v2)
86 d = projection(d, l2, v2)
87 grid = get_grid(a, b, c, d, hough, size)
88 dist = distance(lines, grid, size)
91 #error_surface(lines, a, b, c, d, hough, size, v1)
95 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
96 grids = [(get_grid(a + t[0] * v1, b + t[1] * v1,
97 c, d, hough, size), t) for t in ts1]
98 distances = [(distance(lines, grid, size),
99 grid, t) for grid, t in grids]
100 distances.sort(reverse=True)
101 if distances[0][0] > dist:
102 dist = distances[0][0]
103 grid = distances[0][1]
105 a, b = a + t[0] * v1, b + t[1] * v1
115 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
116 grids = [(get_grid(a, b,
117 c + t[0] * v2, d + t[1] * v2, hough, size), t) for t in ts1]
118 distances = [(distance(lines, grid, size),
119 grid, t) for grid, t in grids]
120 distances.sort(reverse=True)
121 if distances[0][0] > dist:
122 dist = distances[0][0]
123 grid = distances[0][1]
125 c, d = c + t[0] * v2, d + t[1] * v2
131 grid_lines = [[l2ad(l, size) for l in grid[0]], [l2ad(l, size) for l in grid[1]]]
132 return grid, grid_lines
134 def get_grid(a, b, c, d, hough, size):
135 l1 = hough.lines_from_list([a.t(), b.t()])
136 l2 = hough.lines_from_list([c.t(), d.t()])
137 c = intersections_from_angl_dist([l1, l2], size, get_all=True)
138 #TODO do something when a corner is outside the image
139 corners = (c[0] + c[1])
142 raise GridFittingFailedError
143 grid = g_grid(corners)
146 def distance(lines, grid, size):
147 im_l = Image.new('L', size)
148 dr_l = ImageDraw.Draw(im_l)
149 for line in sum(lines, []):
150 dr_l.line(line_from_angl_dist(line, size), width=1, fill=255)
151 im_l = im_l.filter(MyGaussianBlur(radius=3))
152 #GaussianBlur is undocumented class, may not work in future versions of PIL
153 im_g = Image.new('L', size)
154 dr_g = ImageDraw.Draw(im_g)
155 for line in grid[0] + grid[1]:
156 dr_g.line(line, width=1, fill=255)
157 #im_g = im_g.filter(MyGaussianBlur(radius=3))
158 #im_d, distance = combine(im_l, im_g)
159 distance = pcf.combine(im_l.tostring(), im_g.tostring())
165 #res = Image.new('L', fg.size)
171 for x in xrange(fg.size[0]):
172 for y in xrange(fg.size[1]):
174 #res_l[x, y] = bg_l[x, y] * fg_l[x, y]
178 #return res, float(score)/area
179 return None, float(score)/area