1 """Imago intersections module."""
3 from math import cos, tan, pi
4 from operator import itemgetter
13 """Return normalized line."""
15 line = line[0] + pi, - line[1]
19 """Return lines sorted by distance."""
20 l_max = max(l[0] for l in lines)
21 l_min = min(l[0] for l in lines)
22 if l_max - l_min > (3. / 4) * pi:
23 lines = [dst(l) for l in lines]
24 lines.sort(key=itemgetter(1))
27 def board(image, lines, show_all, do_something):
28 """Compute intersections, find stone colors and return board situation."""
29 # TODO refactor show_all, do_something
30 lines = [dst_sort(l) for l in lines]
31 intersections = intersections_from_angl_dist(lines, image.size)
34 image_g = image.copy()
35 draw = ImageDraw.Draw(image_g)
36 for line in intersections:
38 draw.point((x , y), fill=(120, 255, 120))
39 do_something(image_g, "intersections")
41 image_c = filters.color_enhance(image)
43 do_something(image_c, "white balance")
47 for line in intersections:
48 board_raw.append([stone_color_raw(image_c, intersection) for intersection in
50 board_raw = sum(board_raw, [])
52 ### Show color distribution
53 luma = [s[0] for s in board_raw]
54 saturation = [s[1] for s in board_raw]
57 import matplotlib.pyplot as pyplot
59 fig = pyplot.figure(figsize=(8, 6))
60 pyplot.scatter(luma, saturation,
68 size = fig.canvas.get_width_height()
69 buff = fig.canvas.tostring_rgb()
70 image_p = Image.fromstring('RGB', size, buff, 'raw')
71 do_something(image_p, "color distribution")
73 clusters = k_means.cluster(3, 2,zip(zip(luma, saturation), range(len(luma))),
74 [[0., 0.5], [0.5, 0.5], [1., 0.5]])
75 #clusters.sort(key=mean_luma)
78 fig = pyplot.figure(figsize=(8, 6))
79 pyplot.scatter([d[0][0] for d in clusters[0]], [d[0][1] for d in clusters[0]],
81 pyplot.scatter([d[0][0] for d in clusters[1]], [d[0][1] for d in clusters[1]],
83 pyplot.scatter([d[0][0] for d in clusters[2]], [d[0][1] for d in clusters[2]],
88 size = fig.canvas.get_width_height()
89 buff = fig.canvas.tostring_rgb()
90 image_p = Image.fromstring('RGB', size, buff, 'raw')
91 do_something(image_p, "color clustering")
93 clusters[0] = [(p[1], 'B') for p in clusters[0]]
94 clusters[1] = [(p[1], '.') for p in clusters[1]]
95 clusters[2] = [(p[1], 'W') for p in clusters[2]]
97 board_rl = sum(clusters, [])
99 board_rg = (p[1] for p in board_rl)
103 #TODO 19 should be a size parameter
107 board_r.append(board_rg.next())
108 except StopIteration:
112 return output.Board(19, board_r)
114 def mean_luma(cluster):
115 """Return mean luma of the *cluster* of points."""
116 return sum(c[0][0] for c in cluster) / float(len(cluster))
118 def intersections_from_angl_dist(lines, size, get_all=True):
119 """Take grid-lines and size of the image. Return intersections."""
121 for (angl1, dist1) in lines[1]:
123 for (angl2, dist2) in lines[0]:
124 if abs(angl1 - angl2) > 0.4:
125 i_x = (- ((dist2 / cos(angl2)) - (dist1 / cos(angl1)))
126 / (tan(angl1) - tan(angl2)))
127 i_y = (tan(angl1) * i_x) - (dist1 / cos(angl1))
128 if get_all or (-size[0] / 2 < i_x < size[0] / 2 and
129 -size[1] / 2 < i_y < size[1] / 2):
130 line.append((int(i_x + size[0] / 2),
131 int(i_y + size[1] / 2)))
132 intersections.append(line)
136 """Using the HSI color model."""
137 max_diff = max(c) - min(c)
141 return 1. - ((3. * min(c)) / sum(c))
143 def stone_color_raw(image, (x, y)):
144 """Given image and coordinates, return stone color."""
148 for i in range(-size, size + 1):
149 for j in range(-size, size + 1):
151 suma.append(image.getpixel((x + i, y + j)))
155 luma = sum([0.30 * sum(s[0] for s in suma) / t, 0.59 * sum(s[1] for s in suma) / t,
156 0.11 * sum(s[2] for s in suma) / t]) / 255.
157 saturation = sum(RGBtoSat(s) for s in suma) / t
158 color = [sum(s[0] for s in suma) / t, sum(s[1] for s in suma) / t,
159 sum(s[2] for s in suma) / t]
160 return luma, saturation, color