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)
36 def __getitem__(self, key):
41 elif type(key) != int:
42 raise TypeError("V indices must be integers")
44 raise KeyError("V index ({}) out of range".format(key))
52 return V(-self.y, self.x)
54 def projection(point, line, vector):
55 return V(*intersection(g_line(point, point + vector.normal), g_line(*line)))
57 def error_surface(lines, a, b, c, d, hough, size, v1):
58 import matplotlib.pyplot as plt
59 from matplotlib import cm
66 class Worker(threading.Thread):
67 def __init__(self, q_in, q_out, job):
68 threading.Thread.__init__(self)
77 self.q_out.put((x, self.job(x)))
88 for i in range(-k, k):
89 X.append(range(-k, k))
92 job = lambda x: [distance(lines, get_grid(a + X[x][y] * s * v1,
95 size) for y in range(0,2 * k)]
100 t = Worker(q_in, q_out, job)
105 for x in range(0, 2*k):
110 print time.time() - start
114 Z.append(q_out.get_nowait())
119 Z = [t for (x, t) in Z]
121 s_file = open('surface' + str(k), 'w')
122 pickle.dump((X, Y, Z), s_file)
124 plt.imshow(Z, cmap=cm.gnuplot2, interpolation='bicubic',
125 origin='upper', extent=(-k, k, -k, k), aspect='equal')
132 def find(lines, size, l1, l2, bounds, hough, do_something):
133 a, b, c, d = [V(*a) for a in bounds]
134 l1 = line_from_angl_dist(l1, size)
135 l2 = line_from_angl_dist(l2, size)
136 v1 = V(*l1[0]) - V(*l1[1])
137 v2 = V(*l2[0]) - V(*l2[1])
138 a = projection(a, l1, v1)
139 b = projection(b, l1, v1)
140 c = projection(c, l2, v2)
141 d = projection(d, l2, v2)
143 #error_surface(lines, a, b, c, d, hough, size, v1)
145 grid = get_grid(a, b, c, d, hough, size)
146 dist = distance(lines, grid, size)
151 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
152 grids = [(get_grid(a + t[0] * v1, b + t[1] * v1,
153 c, d, hough, size), t) for t in ts1]
154 distances = [(distance(lines, grid, size),
155 grid, t) for grid, t in grids]
156 distances.sort(reverse=True)
157 if distances[0][0] > dist:
158 dist = distances[0][0]
159 grid = distances[0][1]
161 a, b = a + t[0] * v1, b + t[1] * v1
171 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
172 grids = [(get_grid(a, b,
173 c + t[0] * v2, d + t[1] * v2, hough, size), t) for t in ts1]
174 distances = [(distance(lines, grid, size),
175 grid, t) for grid, t in grids]
176 distances.sort(reverse=True)
177 if distances[0][0] > dist:
178 dist = distances[0][0]
179 grid = distances[0][1]
181 c, d = c + t[0] * v2, d + t[1] * v2
187 grid_lines = [[l2ad(l, size) for l in grid[0]], [l2ad(l, size) for l in grid[1]]]
188 return grid, grid_lines
190 def get_grid(a, b, c, d, hough, size):
191 l1 = hough.lines_from_list([a, b])
192 l2 = hough.lines_from_list([c, d])
193 c = intersections_from_angl_dist([l1, l2], size, get_all=True)
194 #TODO do something when a corner is outside the image
195 corners = (c[0] + c[1])
198 raise GridFittingFailedError
199 grid = g_grid(corners)
202 def distance(lines, grid, size):
203 im_l = Image.new('L', size)
204 dr_l = ImageDraw.Draw(im_l)
205 for line in sum(lines, []):
206 dr_l.line(line_from_angl_dist(line, size), width=1, fill=255)
207 im_l = im_l.filter(MyGaussianBlur(radius=15))
208 #GaussianBlur is undocumented class, may not work in future versions of PIL
209 im_g = Image.new('L', size)
210 dr_g = ImageDraw.Draw(im_g)
211 for line in grid[0] + grid[1]:
212 dr_g.line(line, width=1, fill=255)
213 #im_g = im_g.filter(MyGaussianBlur(radius=3))
214 #im_d, distance = combine(im_l, im_g)
215 distance = pcf.combine(im_l.tostring(), im_g.tostring())
221 #res = Image.new('L', fg.size)
227 for x in xrange(fg.size[0]):
228 for y in xrange(fg.size[1]):
230 #res_l[x, y] = bg_l[x, y] * fg_l[x, y]
234 #return res, float(score)/area
235 return None, float(score)/area