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)))
58 X, Y, im_l, a, b, c, d, s, v1, k, hough, size = args
59 return [distance(im_l,
60 get_grid(a + X[y] * s * v1,
63 size) for y in range(0,2 * k)]
65 def error_surface(im_l, a, b, c, d, hough, size, v1):
66 import matplotlib.pyplot as plt
67 from matplotlib import cm
68 import multiprocessing
78 for i in range(-k, k):
79 X.append(range(-k, k))
82 tasks = [(X[x], Y[x], im_l, a, b, c, d, s, v1, k, hough, size) for x in xrange(0, 2 * k)]
83 #everything is passed by value here; can it somehow be passed by reference?
85 pool = multiprocessing.Pool(None)
88 Z = pool.map(job, tasks, 1)
89 print time.time() - start
91 s_file = open('surface' + str(k), 'w')
92 pickle.dump((X, Y, Z), s_file)
94 plt.imshow(Z, cmap=cm.jet, interpolation='bicubic',
95 origin='upper', extent=(-k, k, -k, k), aspect='equal')
102 def find(lines, size, l1, l2, bounds, hough, do_something):
103 a, b, c, d = [V(*a) for a in bounds]
104 l1 = line_from_angl_dist(l1, size)
105 l2 = line_from_angl_dist(l2, size)
106 v1 = V(*l1[0]) - V(*l1[1])
107 v2 = V(*l2[0]) - V(*l2[1])
108 a = projection(a, l1, v1)
109 b = projection(b, l1, v1)
110 c = projection(c, l2, v2)
111 d = projection(d, l2, v2)
113 im_l = Image.new('L', size)
114 dr_l = ImageDraw.Draw(im_l)
115 for line in sum(lines, []):
116 dr_l.line(line_from_angl_dist(line, size), width=1, fill=255)
117 im_l = im_l.filter(MyGaussianBlur(radius=50))
118 #GaussianBlur is undocumented class, may not work in future versions of PIL
119 im_l = im_l.tostring()
121 #error_surface(im_l, a, b, c, d, hough, size, v1)
123 grid = get_grid(a, b, c, d, hough, size)
124 dist = distance(im_l, grid, size)
129 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
130 grids = [(get_grid(a + t[0] * v1, b + t[1] * v1,
131 c, d, hough, size), t) for t in ts1]
132 distances = [(distance(im_l, grid, size),
133 grid, t) for grid, t in grids]
134 distances.sort(reverse=True)
135 if distances[0][0] > dist:
136 dist = distances[0][0]
137 grid = distances[0][1]
139 a, b = a + t[0] * v1, b + t[1] * v1
149 ts1 = [(s, 0), (-s, 0), (s, s), (-s, -s), (-s, s), (s, -s), (0, s), (0, -s)]
150 grids = [(get_grid(a, b,
151 c + t[0] * v2, d + t[1] * v2, hough, size), t) for t in ts1]
152 distances = [(distance(im_l, grid, size),
153 grid, t) for grid, t in grids]
154 distances.sort(reverse=True)
155 if distances[0][0] > dist:
156 dist = distances[0][0]
157 grid = distances[0][1]
159 c, d = c + t[0] * v2, d + t[1] * v2
165 grid_lines = [[l2ad(l, size) for l in grid[0]], [l2ad(l, size) for l in grid[1]]]
166 return grid, grid_lines
168 def get_grid(a, b, c, d, hough, size):
169 l1 = hough.lines_from_list([a, b])
170 l2 = hough.lines_from_list([c, d])
171 c = intersections_from_angl_dist([l1, l2], size, get_all=True)
172 #TODO do something when a corner is outside the image
173 corners = (c[0] + c[1])
176 raise GridFittingFailedError
177 grid = g_grid(corners)
180 def distance(im_l, grid, size):
181 im_g = Image.new('L', size)
182 dr_g = ImageDraw.Draw(im_g)
183 for line in grid[0] + grid[1]:
184 dr_g.line(line, width=1, fill=255)
185 #im_g = im_g.filter(MyGaussianBlur(radius=3))
186 #GaussianBlur is undocumented class, may not work in future versions of PIL
187 #im_d, distance = combine(im_l, im_g)
188 distance = pcf.combine(im_l, im_g.tostring())
194 #res = Image.new('L', fg.size)
200 for x in xrange(fg.size[0]):
201 for y in xrange(fg.size[1]):
203 #res_l[x, y] = bg_l[x, y] * fg_l[x, y]
207 #return res, float(score)/area
208 return None, float(score)/area