rename samples/{python2 -> python}

samples/python/houghcircles.py

@@ -0,0 +1,39 @@
+#!/usr/bin/python
+
+'''
+This example illustrates how to use cv2.HoughCircles() function.
+
+Usage:
+    houghcircles.py [<image_name>]
+    image argument defaults to ../data/board.jpg
+'''
+
+# Python 2/3 compatibility
+from __future__ import print_function
+
+import cv2
+import numpy as np
+import sys
+
+if __name__ == '__main__':
+    print(__doc__)
+
+    try:
+        fn = sys.argv[1]
+    except IndexError:
+        fn = "../data/board.jpg"
+
+    src = cv2.imread(fn, 1)
+    img = cv2.cvtColor(src, cv2.COLOR_BGR2GRAY)
+    img = cv2.medianBlur(img, 5)
+    cimg = src.copy() # numpy function
+
+    circles = cv2.HoughCircles(img, cv2.HOUGH_GRADIENT, 1, 10, np.array([]), 100, 30, 1, 30)
+    a, b, c = circles.shape
+    for i in range(b):
+        cv2.circle(cimg, (circles[0][i][0], circles[0][i][1]), circles[0][i][2], (0, 0, 255), 3, cv2.LINE_AA)
+        cv2.circle(cimg, (circles[0][i][0], circles[0][i][1]), 2, (0, 255, 0), 3, cv2.LINE_AA)  # draw center of circle
+
+    cv2.imshow("source", src)
+    cv2.imshow("detected circles", cimg)
+    cv2.waitKey(0)