python cv2:

simple video capture and synth framework stub
edge detection sample

samples/python2/edge.py

@@ -0,0 +1,29 @@
+import cv2, cv
+import video
+import sys
+
+try: fn = sys.argv[1]
+except: fn = 'synth:bg=../cpp/lena.jpg:noise=0.1'
+
+def nothing(*arg):
+    pass
+
+cv2.namedWindow('edge')
+cv.CreateTrackbar('thrs1', 'edge', 2000, 5000, nothing)
+cv.CreateTrackbar('thrs2', 'edge', 4000, 5000, nothing)
+
+cap = video.create_capture(fn)
+while True:
+    flag, img = cap.read()
+    gray = cv2.cvtColor(img, cv.CV_BGR2GRAY)
+    thrs1 = cv2.getTrackbarPos('thrs1', 'edge')
+    thrs2 = cv2.getTrackbarPos('thrs2', 'edge')
+    edge = cv2.canny(gray, thrs1, thrs2, apertureSize=5)
+    vis = img.copy()
+    vis /= 2
+    vis[edge != 0] = (0, 255, 0)
+    cv2.imshow('edge', vis)
+    ch = cv2.waitKey(5)
+    if ch == 27:
+        break
+