1 """Imago intersections module."""
3 from math import cos, tan, pi
4 from operator import itemgetter
14 """Return normalized line."""
16 line = line[0] + pi, - line[1]
20 """Return lines sorted by distance."""
21 l_max = max(l[0] for l in lines)
22 l_min = min(l[0] for l in lines)
23 if l_max - l_min > (3. / 4) * pi:
24 lines = [dst(l) for l in lines]
25 lines.sort(key=itemgetter(1))
28 def board(image, lines, show_all, do_something):
29 """Compute intersections, find stone colors and return board situation."""
30 # TODO refactor show_all, do_something
31 # TODO refactor this into smaller functions
32 lines = [dst_sort(l) for l in lines]
33 intersections = intersections_from_angl_dist(lines, image.size)
36 image_g = image.copy()
37 draw = ImageDraw.Draw(image_g)
38 for line in intersections:
40 draw.point((x , y), fill=(120, 255, 120))
41 do_something(image_g, "intersections")
43 image_c = filters.color_enhance(image)
45 do_something(image_c, "white balance")
49 for line in intersections:
50 board_raw.append([stone_color_raw(image_c, intersection) for intersection in
52 board_raw = sum(board_raw, [])
54 ### Show color distribution
55 luma = [s[0] for s in board_raw]
56 saturation = [s[1] for s in board_raw]
59 import matplotlib.pyplot as pyplot
61 fig = pyplot.figure(figsize=(8, 6))
62 pyplot.scatter(luma, saturation,
70 size = fig.canvas.get_width_height()
71 buff = fig.canvas.tostring_rgb()
72 image_p = Image.fromstring('RGB', size, buff, 'raw')
73 do_something(image_p, "color distribution")
75 clusters = k_means.cluster(3, 2,zip(zip(luma, saturation), range(len(luma))),
76 [[0., 0.5], [0.5, 0.5], [1., 0.5]])
79 fig = pyplot.figure(figsize=(8, 6))
80 pyplot.scatter([d[0][0] for d in clusters[0]], [d[0][1] for d in clusters[0]],
82 pyplot.scatter([d[0][0] for d in clusters[1]], [d[0][1] for d in clusters[1]],
84 pyplot.scatter([d[0][0] for d in clusters[2]], [d[0][1] for d in clusters[2]],
89 size = fig.canvas.get_width_height()
90 buff = fig.canvas.tostring_rgb()
91 image_p = Image.fromstring('RGB', size, buff, 'raw')
92 do_something(image_p, "color clustering")
94 clusters[0] = [(p[1], 'B') for p in clusters[0]]
95 clusters[1] = [(p[1], '.') for p in clusters[1]]
96 clusters[2] = [(p[1], 'W') for p in clusters[2]]
98 board_rl = sum(clusters, [])
100 board_rg = (p[1] for p in board_rl)
104 #TODO 19 should be a size parameter
108 board_r.append(board_rg.next())
109 except StopIteration:
113 return output.Board(19, board_r)
115 def mean_luma(cluster):
116 """Return mean luma of the *cluster* of points."""
117 return sum(c[0][0] for c in cluster) / float(len(cluster))
119 def to_general(line, size):
121 (x1, y1), (x2, y2) = linef.line_from_angl_dist(line, size)
122 return (y2 - y1, x1 - x2, x2 * y1 - x1 * y2)
124 def intersection(l1, l2):
127 delim = float(a1 * b2 - b1 * a2)
128 x = (b1 * c2 - c1 * b2) / delim
129 y = (c1 * a2 - a1 * c2) / delim
132 def intersections_from_angl_dist(lines, size, get_all=True):
133 """Take grid-lines and size of the image. Return intersections."""
134 lines1 = map(lambda l: to_general(l, size), lines[1])
135 lines0 = map(lambda l: to_general(l, size), lines[0])
140 line.append(intersection(l1, l2))
141 intersections.append(line)
144 def rgb2lumsat(color):
145 """Convert RGB to luma and HSI model saturation."""
147 luma = (0.30 * r + 0.59 * g + 0.11 * b) / 255.0
148 max_diff = max(color) - min(color)
152 saturation = 1. - ((3. * min(color)) / sum(color))
153 return luma, saturation
156 #TODO comment (or delete maybe?)
159 return (lst[len_lst / 2] + lst[len_lst / 2 + 1]) / 2.0
161 return lst[len_lst / 2]
163 def stone_color_raw(image, (x, y)):
164 """Given image and coordinates, return stone color."""
167 for i in range(-size, size + 1):
168 for j in range(-size, size + 1):
170 points.append(image.getpixel((x + i, y + j)))
173 norm = float(len(points))
175 return 0, 0, (0, 0, 0) #TODO trow exception here
176 color = (sum(p[0] for p in points) / norm,
177 sum(p[1] for p in points) / norm,
178 sum(p[2] for p in points) / norm)
179 luma, saturation = rgb2lumsat(color)
180 return luma, saturation, color