lines cache

diff --git a/imago.py b/imago.py
index 66c758f..d648580 100755 (executable)
--- a/imago.py
+++ b/imago.py
@@ -5,6 +5,7 @@
 import sys
 import os
 import argparse
+import pickle
 
 try:
     import Image, ImageDraw
@@ -34,6 +35,8 @@ def main():
                         help="show every step of the computation")
     parser.add_argument('-s', '--save', dest='saving', action='store_true',
                         help="save images instead of displaying them")
+    parser.add_argument('-c', '--cache', dest='l_cache', action='store_true',
+                        help="use cached lines")
     parser.add_argument('-v', '--verbose', dest='verbose', action='store_true',
                         help="report progress")
     args = parser.parse_args()
@@ -64,7 +67,23 @@ def main():
             #TODO ask user to try again
             return 1
     else:
-        lines, l1, l2, bounds, hough, im_h = linef.find_lines(image, show_all, do_something, verbose)
+        if args.l_cache:
+            filename = ("saved/cache/" + args.files[0][:-4] + "_" +
+                       str(image.size[0]))
+            if os.path.exists(filename):
+                lines, l1, l2, bounds, hough = pickle.load(open(filename))
+                print >> sys.stderr, "using cached results"
+                im_h = None
+            else:
+                lines, l1, l2, bounds, hough, im_h = linef.find_lines(image, show_all, do_something, verbose)
+                if not os.path.isdir("saved/cache"):
+                    os.makedirs("saved/cache")
+                d_file = open(filename, 'wb')
+                pickle.dump((lines, l1, l2, bounds, hough), d_file)
+                d_file.close()
+        else:
+            lines, l1, l2, bounds, hough, im_h = linef.find_lines(image, show_all, do_something, verbose)
+
         grid, lines = gridf.find(lines, image.size, l1, l2, bounds, hough,
                                  do_something, im_h)
         if show_all: