1 """Imago intersections module."""
3 from math import cos, tan, pi
4 from operator import itemgetter
7 from PIL import ImageDraw
15 """Return normalized line."""
17 line = line[0] + pi, - line[1]
21 """Return lines sorted by distance."""
22 l_max = max(l[0] for l in lines)
23 l_min = min(l[0] for l in lines)
24 if l_max - l_min > (3. / 4) * pi:
25 lines = [dst(l) for l in lines]
26 lines.sort(key=itemgetter(1))
29 def b_intersects(image, lines, show_all, do_something, logger):
30 """Compute intersections."""
31 # TODO refactor show_all, do_something
32 # TODO refactor this into smaller functions
33 logger("finding the stones")
34 lines = [dst_sort(l) for l in lines]
35 an0 = (sum([l[0] for l in lines[0]]) / len(lines[0]) - pi / 2)
36 an1 = (sum([l[0] for l in lines[1]]) / len(lines[1]) - pi / 2)
38 lines = [lines[1], lines[0]]
40 intersections = intersections_from_angl_dist(lines, image.size)
43 image_g = image.copy()
44 draw = ImageDraw.Draw(image_g)
45 for line in intersections:
47 draw.point((x , y), fill=(120, 255, 120))
48 do_something(image_g, "intersections")
52 def board(image, intersections, show_all, do_something, logger):
53 """Find stone colors and return board situation."""
55 # image_c = filters.color_enhance(image)
57 # do_something(image_c, "white balance")
62 for line in intersections:
63 board_raw.append([stone_color_raw(image_c, intersection) for intersection in
65 board_raw = sum(board_raw, [])
67 ### Show color distribution
70 import matplotlib.pyplot as pyplot
72 fig = pyplot.figure(figsize=(8, 6))
73 luma = [s[0] for s in board_raw]
74 saturation = [s[1] for s in board_raw]
75 pyplot.scatter(luma, saturation,
76 color=[s[2] for s in board_raw])
80 size = fig.canvas.get_width_height()
81 buff = fig.canvas.tostring_rgb()
82 image_p = Image.fromstring('RGB', size, buff, 'raw')
83 do_something(image_p, "color distribution")
85 #max_s0 = max(s[0] for s in board_raw)
86 #min_s0 = min(s[0] for s in board_raw)
87 #norm_s0 = lambda x: (x - min_s0) / (max_s0 - min_s0)
88 #max_s1 = max(s[1] for s in board_raw)
89 #min_s1 = min(s[1] for s in board_raw)
90 #norm_s1 = lambda x: (x - min_s1) / (max_s1 - min_s1)
91 #max_s1 = max(s[1] for s in board_raw)
92 #min_s1 = min(s[1] for s in board_raw)
93 #norm_s1 = lambda x: (x - min_s1) / (max_s1 - min_s1)
94 #color_data = [(norm_s0(s[0]), norm_s1(s[1])) for s in board_raw]
95 color_data = [(s[0], s[1]) for s in board_raw]
97 init_x = sum(c[0] for c in color_data) / float(len(color_data))
99 clusters, score = k_means.cluster(3, 2,zip(color_data, range(len(color_data))),
100 [[0., 0.5], [init_x, 0.5], [1., 0.5]])
101 # clusters1, score1 = k_means.cluster(1, 2,zip(color_data, range(len(color_data))),
103 # clusters2, score2 = k_means.cluster(2, 2,zip(color_data, range(len(color_data))),
104 # [[0., 0.5], [0.75, 0.5]])
106 # print >> sys.stderr, score1, score2, score
109 fig = pyplot.figure(figsize=(8, 6))
110 pyplot.scatter([d[0][0] for d in clusters[0]], [d[0][1] for d in clusters[0]],
112 pyplot.scatter([d[0][0] for d in clusters[1]], [d[0][1] for d in clusters[1]],
114 pyplot.scatter([d[0][0] for d in clusters[2]], [d[0][1] for d in clusters[2]],
119 size = fig.canvas.get_width_height()
120 buff = fig.canvas.tostring_rgb()
121 image_p = Image.fromstring('RGB', size, buff, 'raw')
122 do_something(image_p, "color clustering")
124 clusters[0] = [(p[1], 'B') for p in clusters[0]]
125 clusters[1] = [(p[1], '.') for p in clusters[1]]
126 clusters[2] = [(p[1], 'W') for p in clusters[2]]
128 board_rl = sum(clusters, [])
130 board_rg = (p[1] for p in board_rl)
134 #TODO 19 should be a size parameter
138 board_r.append(board_rg.next())
139 except StopIteration:
142 return output.Board(19, board_r)
144 def mean_luma(cluster):
145 """Return mean luminanace of the *cluster* of points."""
146 return sum(c[0][0] for c in cluster) / float(len(cluster))
148 def to_general(line, size):
150 (x1, y1), (x2, y2) = linef.line_from_angl_dist(line, size)
151 return (y2 - y1, x1 - x2, x2 * y1 - x1 * y2)
153 def intersection(l1, l2):
156 delim = float(a1 * b2 - b1 * a2)
157 x = (b1 * c2 - c1 * b2) / delim
158 y = (c1 * a2 - a1 * c2) / delim
161 # TODO remove the parameter get_all
162 def intersections_from_angl_dist(lines, size, get_all=True):
163 """Take grid-lines and size of the image. Return intersections."""
164 lines0 = map(lambda l: to_general(l, size), lines[0])
165 lines1 = map(lambda l: to_general(l, size), lines[1])
170 line.append(intersection(l1, l2))
171 intersections.append(line)
174 def rgb2lumsat(color):
175 """Convert RGB to luminance and HSI model saturation."""
177 luma = (0.30 * r + 0.59 * g + 0.11 * b) / 255.0
178 max_diff = max(color) - min(color)
182 saturation = 1. - ((3. * min(color)) / sum(color))
183 return luma, saturation
186 #TODO comment (or delete maybe?)
189 return (lst[len_lst / 2] + lst[len_lst / 2 + 1]) / 2.0
191 return lst[len_lst / 2]
193 def stone_color_raw(image, (x, y)):
194 """Given image and coordinates, return stone color."""
197 for i in range(-size, size + 1):
198 for j in range(-size, size + 1):
200 points.append(image.getpixel((x + i, y + j)))
203 norm = float(len(points))
205 return 0, 0, (0, 0, 0) #TODO trow exception here
206 norm = float(norm*255)
207 color = (sum(p[0] for p in points) / norm,
208 sum(p[1] for p in points) / norm,
209 sum(p[2] for p in points) / norm)
210 hue, luma, saturation = colorsys.rgb_to_hls(*color)
211 color = colorsys.hls_to_rgb(hue, 0.5, 1.)
212 return luma, saturation, color, hue