From: Tomas Musil <tomik.musil@gmail.com>
Date: Sat, 20 Oct 2012 18:55:19 +0000 (+0200)
Subject: error surface plots
X-Git-Url: http://git.tomasm.cz/imago.git/commitdiff_plain/f2f525ee1484b0d7f361f9b3f0dab302a94a1d47

error surface plots
---

diff --git a/gridf.py b/gridf.py
index 83a9771..bc84ea8 100644
--- a/gridf.py
+++ b/gridf.py
@@ -40,6 +40,38 @@ def projection(point, line, vector):
     l2 = g_line(point.t(), (point + n).t())
     return V(*intersection(l2, g_line(*line)))
     
+def error_surface(lines, a, b, c, d, hough, size, v1):
+    import matplotlib.pyplot as plt
+    from matplotlib import cm
+    import time
+    import pickle
+    X = []
+    Y = []
+    Z = []
+    s = 0.001
+    k = 5
+    for i in range(-k, k):
+        X.append(range(-k, k))
+        Y.append(2*k*[i])
+        
+    start = time.clock()
+    for x in range(0, 2*k):
+        try:
+            Z.append([distance(lines, get_grid(a + X[x][y] * s * v1, b + Y[x][y] * s * v1, 
+                                           c, d, hough, size),
+                              size) for y in range(0, 2* k)])
+        except Exception:
+            Z.append(Z[-1])
+        o = ((time.clock() - start) * (2 * k - (x + 1))) / (60 * (x + 1))
+        print x + 1, "{0} h {1:2.2f} m".format(int(o) / 60, o % 60)
+    s_file = open('surface' + str(k), 'w')
+    pickle.dump((X, Y, Z), s_file)
+    s_file.close()
+    plt.imshow(Z, cmap=cm.gnuplot2, interpolation='bicubic', 
+               origin='upper', extent=(-k, k, -k, k), aspect='equal')
+    plt.colorbar()
+
+    plt.show()
 
 def find(lines, size, l1, l2, bounds, hough, do_something):
     a, b, c, d = [V(*a) for a in bounds]
@@ -54,6 +86,8 @@ def find(lines, size, l1, l2, bounds, hough, do_something):
     grid = get_grid(a, b, c, d, hough, size)
     dist = distance(lines, grid, size)
     print dist
+
+    #error_surface(lines, a, b, c, d, hough, size, v1)
     
     s = 0.02
     while True:
@@ -100,6 +134,7 @@ def get_grid(a, b, c, d, hough, size):
     l1 = hough.lines_from_list([a.t(), b.t()])
     l2 = hough.lines_from_list([c.t(), d.t()])
     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
@@ -113,7 +148,7 @@ def distance(lines, grid, size):
     for line in sum(lines, []):
         dr_l.line(line_from_angl_dist(line, size), width=1, fill=255)
     im_l = im_l.filter(MyGaussianBlur(radius=3))
-    # GaussianBlur is undocumented class, may not work in future versions of PIL
+    #GaussianBlur is undocumented class, may not work in future versions of PIL
     im_g = Image.new('L', size)
     dr_g = ImageDraw.Draw(im_g)
     for line in grid[0] + grid[1]:
@@ -125,8 +160,8 @@ def distance(lines, grid, size):
 def combine(bg, fg):
     bg_l = bg.load()
     fg_l = fg.load()
-    res = Image.new('L', fg.size)
-    res_l = res.load()
+    #res = Image.new('L', fg.size)
+    #res_l = res.load()
 
     score = 0
     area = 0
@@ -134,8 +169,9 @@ def combine(bg, fg):
     for x in xrange(fg.size[0]):
         for y in xrange(fg.size[1]):
             if fg_l[x, y]:
-                res_l[x, y] = bg_l[x, y] * fg_l[x, y]
+                #res_l[x, y] = bg_l[x, y] * fg_l[x, y]
                 score +=  bg_l[x, y]
                 area += 1
 
-    return res, float(score)/area
+    #return res, float(score)/area
+    return None, float(score)/area