X-Git-Url: http://git.tomasm.cz/imago.git/blobdiff_plain/10466a9c920f1d67bf85d85af671bcb8e5fbd533..24a7e923346be5e355a7d61e642fc469310444ef:/intrsc.py?ds=sidebyside

diff --git a/intrsc.py b/intrsc.py
index cead665..97f9987 100644
--- a/intrsc.py
+++ b/intrsc.py
@@ -1,52 +1,120 @@
-from math import sin, cos, tan
+"""Imago intersections module"""
+
+from math import cos, tan, pi
 from operator import itemgetter
 
-import Image, ImageDraw
+import ImageDraw
+
+import k_means
+
+def dst(line):
+    """Return normalized line."""
+    if line[0] < pi / 2:
+        line = line[0] + pi, - line[1]
+    return line
+
+def dst_sort(lines):
+    """Return lines sorted by distance."""
+    l_max = max(l[0] for l in lines)
+    l_min = min(l[0] for l in lines)
+    if l_max - l_min > (3. / 4) * pi:
+        lines = [dst(l) for l in lines]
+    lines.sort(key=itemgetter(1))
+    return lines
 
 def board(image, lines, show_all, do_something):
+    """Compute intersections, find stone colors and return board situation."""
+    lines = [dst_sort(l) for l in lines]
     intersections = intersections_from_angl_dist(lines, image.size)
-    image_g = image.copy()
-    draw = ImageDraw.Draw(image_g)
-    for line in intersections:
-        for (x, y) in line:
-            draw.point((x , y), fill=(120, 255, 120))
 
     if show_all:
+        image_g = image.copy()
+        draw = ImageDraw.Draw(image_g)
+        for line in intersections:
+            for (x, y) in line:
+                draw.point((x , y), fill=(120, 255, 120))
         do_something(image_g, "intersections")
 
-    board = []
+    board_raw = []
     
     for line in intersections:
-        board.append([stone_color(image, intersection) for intersection in
+        board_raw.append([stone_color_raw(image, intersection) for intersection in
                       line])
-    return board
+    board_raw = sum(board_raw, [])
+
+    ### Show color distribution
+    luma = [(0.30 * s[0] + 0.59 * s[1] + 0.11 * s[2]) / 255.
+                 for s in board_raw]
+    saturation = [(max(s) - min(s)) / (255 - abs(max(s) + min(s) - 255))
+                 for s in board_raw]
+    if show_all:
+        import matplotlib.pyplot as pyplot
+        pyplot.scatter(luma, saturation, color=[(s[0]/255., s[1]/255., s[2]/255., 1.) 
+                                            for s in board_raw])
+        pyplot.show()
+
+    clusters = k_means.cluster(3, 2,zip(zip(luma, saturation), range(len(luma))),
+                               [[0., 0.], [0.5, 0.25], [1., 0.5]])
+   #clusters.sort(key=mean_luma)
+
+    if show_all:
+        pyplot.scatter([d[0][0] for d in clusters[0]], [d[0][1] for d in clusters[0]],
+                                                 color=(1,0,0,1))
+        pyplot.scatter([d[0][0] for d in clusters[1]], [d[0][1] for d in clusters[1]],
+                                                 color=(0,1,0,1))
+        pyplot.scatter([d[0][0] for d in clusters[2]], [d[0][1] for d in clusters[2]],
+                                                 color=(0,0,1,1))
+        pyplot.show()
+
+    clusters[0] = [(p[1], 'B') for p in clusters[0]]
+    clusters[1] = [(p[1], '.') for p in clusters[1]]
+    clusters[2] = [(p[1], 'W') for p in clusters[2]]
+
+    board_rl = sum(clusters, [])
+    board_rl.sort()
+    board_rg = (p[1] for p in board_rl)
+    
+    board_r = []
+
+    try:
+        for i in xrange(19):
+            board_r.append([])
+            for _ in xrange(19):
+                board_r[i].append(board_rg.next())
+    except StopIteration:
+        pass
+
+    return board_r
+
+def mean_luma(cluster):
+    return sum(c[0][0] for c in cluster) / float(len(cluster))
 
-def intersections_from_angl_dist(lines, size, get_all=False):
+def intersections_from_angl_dist(lines, size, get_all=True):
+    """Take grid-lines and size of the image. Return intersections."""
     intersections = []
-    for (angl1, dist1) in sorted(lines[1], key=itemgetter(1)):
+    for (angl1, dist1) in lines[1]:
         line = []
-        for (angl2, dist2) in sorted(lines[0], key=itemgetter(1)):
+        for (angl2, dist2) in lines[0]:
             if abs(angl1 - angl2) > 0.4:
-                x =  - ((dist2 / cos(angl2)) - (dist1 / cos(angl1))) / (tan(angl1) - tan(angl2))
-                y = (tan(angl1) * x) - (dist1 / cos(angl1))
-                if get_all or (-size[0] / 2 < x < size[0] / 2 and 
-                    -size[1] / 2 < y < size[1] / 2):
-                    line.append((int(x + size[0] / 2), int(y + size[1] / 2)))
+                i_x =  (- ((dist2 / cos(angl2)) - (dist1 / cos(angl1))) 
+                        / (tan(angl1) - tan(angl2)))
+                i_y = (tan(angl1) * i_x) - (dist1 / cos(angl1))
+                if get_all or (-size[0] / 2 < i_x < size[0] / 2 and 
+                    -size[1] / 2 < i_y < size[1] / 2):
+                    line.append((int(i_x + size[0] / 2),
+                                 int(i_y + size[1] / 2)))
         intersections.append(line)
     return intersections
    
-def stone_color(image, (x, y)):
-    suma = 0.
+def stone_color_raw(image, (x, y)):
+    """Given image and coordinates, return stone color."""
+    suma = []
     for i in range(-2, 3):
         for j in range(-2, 3):
             try:
-                suma += sum(image.getpixel((x + i, y + j)))
+                suma.append(image.getpixel((x + i, y + j)))
             except IndexError:
                 pass
-    suma /= 3 * 25
-    if suma < 55:
-        return 'B'
-    elif suma < 200: 
-        return '.'
-    else:
-        return 'W'
+    suma = (sum(s[0] for s in suma) / 25., sum(s[1] for s in suma) / 25., 
+            sum(s[2] for s in suma) / 25.)
+    return suma