"atomic bomb" commit. Reorganized OpenCV directory structure

2010-05-11 17:44:00 +00:00
commit 127d6649a1
1761 changed files with 1766340 additions and 0 deletions
--- a/samples/python/contours.py
+++ b/samples/python/contours.py
@@ -0,0 +1,135 @@
+#! /usr/bin/env python
+
+print "OpenCV Python version of contours"
+
+# import the necessary things for OpenCV
+import cv
+
+# some default constants
+_SIZE = 500
+_DEFAULT_LEVEL = 3
+
+# definition of some colors
+_red =  (0, 0, 255, 0);
+_green =  (0, 255, 0, 0);
+_white = cv.RealScalar (255)
+_black = cv.RealScalar (0)
+
+# the callback on the trackbar, to set the level of contours we want
+# to display
+def on_trackbar (position):
+
+    # create the image for putting in it the founded contours
+    contours_image = cv.CreateImage ( (_SIZE, _SIZE), 8, 3)
+
+    # compute the real level of display, given the current position
+    levels = position - 3
+
+    # initialisation
+    _contours = contours
+    
+    if levels <= 0:
+        # zero or negative value
+        # => get to the nearest face to make it look more funny
+        _contours = contours.h_next().h_next().h_next()
+        
+    # first, clear the image where we will draw contours
+    cv.SetZero (contours_image)
+    
+    # draw contours in red and green
+    cv.DrawContours (contours_image, _contours,
+                       _red, _green,
+                       levels, 3, cv.CV_AA,
+                        (0, 0))
+
+    # finally, show the image
+    cv.ShowImage ("contours", contours_image)
+
+if __name__ == '__main__':
+
+    # create the image where we want to display results
+    image = cv.CreateImage ( (_SIZE, _SIZE), 8, 1)
+
+    # start with an empty image
+    cv.SetZero (image)
+
+    # draw the original picture
+    for i in range (6):
+        dx = (i % 2) * 250 - 30
+        dy = (i / 2) * 150
+        
+        cv.Ellipse (image,
+                       (dx + 150, dy + 100),
+                       (100, 70),
+                      0, 0, 360, _white, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 115, dy + 70),
+                       (30, 20),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 185, dy + 70),
+                       (30, 20),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 115, dy + 70),
+                       (15, 15),
+                      0, 0, 360, _white, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 185, dy + 70),
+                       (15, 15),
+                      0, 0, 360, _white, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 115, dy + 70),
+                       (5, 5),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 185, dy + 70),
+                       (5, 5),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 150, dy + 100),
+                       (10, 5),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 150, dy + 150),
+                       (40, 10),
+                      0, 0, 360, _black, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 27, dy + 100),
+                       (20, 35),
+                      0, 0, 360, _white, -1, 8, 0)
+        cv.Ellipse (image,
+                       (dx + 273, dy + 100),
+                       (20, 35),
+                      0, 0, 360, _white, -1, 8, 0)
+
+    # create window and display the original picture in it
+    cv.NamedWindow ("image", 1)
+    cv.ShowImage ("image", image)
+
+    # create the storage area
+    storage = cv.CreateMemStorage (0)
+    
+    # find the contours
+    contours = cv.FindContours(image,
+                               storage,
+                               cv.CV_RETR_TREE,
+                               cv.CV_CHAIN_APPROX_SIMPLE,
+                               (0,0))
+
+    # comment this out if you do not want approximation
+    contours = cv.ApproxPoly (contours, 
+                                storage,
+                                cv.CV_POLY_APPROX_DP, 3, 1)
+    
+    # create the window for the contours
+    cv.NamedWindow ("contours", 1)
+
+    # create the trackbar, to enable the change of the displayed level
+    cv.CreateTrackbar ("levels+3", "contours", 3, 7, on_trackbar)
+
+    # call one time the callback, so we will have the 1st display done
+    on_trackbar (_DEFAULT_LEVEL)
+
+    # wait a key pressed to end
+    cv.WaitKey (0)