X-Git-Url: http://git.tomasm.cz/imago.git/blobdiff_plain/f6002686fef1bd826f3a1777998416b93d909d56..f16fe1e775f2159741146264a6494e63b0e2d618:/gridf.py?ds=inline

diff --git a/gridf.py b/gridf.py
index c8f4b90..d39bdd5 100644
--- a/gridf.py
+++ b/gridf.py
@@ -1,8 +1,150 @@
+"""Imago grid-fitting module"""
+
+import multiprocessing
+
+import Image, ImageDraw, ImageFilter
+
+from geometry import V, projection
 from manual import lines as g_grid, l2ad
 from intrsc import intersections_from_angl_dist
+from linef import line_from_angl_dist
+import pcf
+
+class GridFittingFailedError(Exception):
+    pass
+
+class MyGaussianBlur(ImageFilter.Filter):
+    name = "GaussianBlur"
+
+    def __init__(self, radius=2):
+        self.radius = radius
+    def filter(self, image):
+        return image.gaussian_blur(self.radius)
+
+def job_br1(args):
+    X, Y, im_l, a, b, c, d, s, v1, v2, k, hough, size = args
+    return [(distance(im_l, 
+             get_grid(a + X[y] * s * v1, 
+                      b + Y[y] * s * v1, 
+                      c, d, hough, size),
+             size), a + X[y] * s * v1, b + Y[y] * s * v1) for y in range(2 *k)]
+
+def job_br2(args):
+    X, Y, im_l, a, b, c, d, s, v1, v2, k, hough, size = args
+    return [(distance(im_l, 
+             get_grid(a, b, c + X[y] * s * v2, 
+                      d + Y[y] * s * v2, 
+                      hough, size),
+             size), c + X[y] * s * v2, d + Y[y] * s * v2) for y in range(2 *k)]
+
+def find(lines, size, l1, l2, bounds, hough, do_something, im_h):
+    a, b, c, d = [V(*a) for a in bounds]
+    l1 = line_from_angl_dist(l1, size)
+    l2 = line_from_angl_dist(l2, size)
+    v1 = V(*l1[0]) - V(*l1[1])
+    v2 = V(*l2[0]) - V(*l2[1])
+    a = projection(a, l1, v1) 
+    b = projection(b, l1, v1) 
+    c = projection(c, l2, v2) 
+    d = projection(d, l2, v2) 
+
+    im_l = Image.new('L', size)
+    dr_l = ImageDraw.Draw(im_l)
+    for line in sum(lines, []):
+        dr_l.line(line_from_angl_dist(line, size), width=1, fill=255)
+
+    #im_l = im_h #hocus pocus    
+    im_l = im_l.filter(MyGaussianBlur(radius=2))
+    #GaussianBlur is undocumented class, may not work in future versions of PIL
+    im_l_s = im_l.tostring()
+
+    #from gridf_analyzer import error_surface
+    #error_surface(im_l, a, b, c, d, hough, size, v1 ,v2)
 
-def find(lines, size, l1, l2):
-    c = intersections_from_angl_dist(lines, size)
-    corners = [c[0][0], c[0][-1], c[-1][0], c[-1][-1]]
+    grid = get_grid(a, b, c, d, hough, size)
+    
+    #let's try the bruteforce aproach:
+    s = 0.001
+    k = 50
+    X, Y = [], []
+    for i in range(-k, k):
+        X.append(range(-k, k))
+        Y.append(2*k*[i])
+
+    pool = multiprocessing.Pool(None)
+
+    tasks = [(X[x], Y[x], im_l_s, a, b, c, d, s, 
+              v1, v2, k, hough, size) for x in xrange(0, 2 * k)]
+
+    import time
+    start = time.time()
+    opt_ab = pool.map(job_br1, tasks, 1)
+    opt_cd = pool.map(job_br2, tasks, 1)
+    d1 = 0
+    for lst in opt_ab:
+        for tpl in lst:
+            if tpl[0] > d1:
+                d1 = tpl[0]
+                a, b = tpl[1], tpl[2]
+    d1 = 0
+    for lst in opt_cd:
+        for tpl in lst:
+            if tpl[0] > d1:
+                d1 = tpl[0]
+                c, d = tpl[1], tpl[2]
+    print time.time() - start
+    grid = get_grid(a, b, c, d, hough, size) 
+    grid_lines = [[l2ad(l, size) for l in grid[0]], 
+                  [l2ad(l, size) for l in grid[1]]]
+    
+    ### 
+
+    im_t = Image.new('RGB', im_l.size, None)
+    im_t_l = im_t.load()
+    im_l_l = im_l.load()
+    for x in xrange(im_t.size[0]):
+        for y in xrange(im_t.size[1]):
+            im_t_l[x, y] = (im_l_l[x, y], 0, 0)
+
+    #im_t_d = ImageDraw.Draw(im_t)
+    #for l in grid[0] + grid[1]:
+    #    im_t_d.line(l, width=1, fill=(0, 255, 0))
+
+    #do_something(im_t, "lines and grid")
+
+
+    ###
+
+    return grid, grid_lines
+
+def get_grid(a, b, c, d, hough, size):
+    l1 = hough.lines_from_list([a, b])
+    l2 = hough.lines_from_list([c, d])
+    c = intersections_from_angl_dist([l1, l2], size, get_all=True)
+    #TODO do something when a corner is outside the image
+    corners = (c[0] + c[1])
+    if len(corners) < 4:
+        print l1, l2, c
+        raise GridFittingFailedError
     grid = g_grid(corners)
     return grid
+
+def line_out(line, size):
+    for p in line:
+        if p[0] < 0 or p[0] > size[0] or p[1] < 0 or p[1] > size[1]:
+            return True
+    else:
+        return False
+
+def distance(im_l, grid, size):
+    im_g = Image.new('L', size)
+    dr_g = ImageDraw.Draw(im_g)
+    for line in grid[0] + grid[1]:
+        dr_g.line(line, width=1, fill=255)
+        if line_out(line, size):
+            return 0
+    #im_g = im_g.filter(MyGaussianBlur(radius=3))
+    #GaussianBlur is undocumented class, may not work in future versions of PIL
+    #im_d, distance = combine(im_l, im_g)
+    distance_d = pcf.combine(im_l, im_g.tostring())
+    return distance_d