python: 'cv2.' -> 'cv.' via 'import cv2 as cv'

samples/python/mouse_and_match.py

@@ -15,7 +15,7 @@ Demonstrate using a mouse to interact with an image:
 from __future__ import print_function
 
 import numpy as np
-import cv2
+import cv2 as cv
 
 # built-in modules
 import os
@@ -30,27 +30,27 @@ sel = (0,0,0,0)
 
 def onmouse(event, x, y, flags, param):
     global drag_start, sel
-    if event == cv2.EVENT_LBUTTONDOWN:
+    if event == cv.EVENT_LBUTTONDOWN:
         drag_start = x, y
         sel = 0,0,0,0
-    elif event == cv2.EVENT_LBUTTONUP:
+    elif event == cv.EVENT_LBUTTONUP:
         if sel[2] > sel[0] and sel[3] > sel[1]:
             patch = gray[sel[1]:sel[3],sel[0]:sel[2]]
-            result = cv2.matchTemplate(gray,patch,cv2.TM_CCOEFF_NORMED)
+            result = cv.matchTemplate(gray,patch,cv.TM_CCOEFF_NORMED)
             result = np.abs(result)**3
-            _val, result = cv2.threshold(result, 0.01, 0, cv2.THRESH_TOZERO)
-            result8 = cv2.normalize(result,None,0,255,cv2.NORM_MINMAX,cv2.CV_8U)
-            cv2.imshow("result", result8)
+            _val, result = cv.threshold(result, 0.01, 0, cv.THRESH_TOZERO)
+            result8 = cv.normalize(result,None,0,255,cv.NORM_MINMAX,cv.CV_8U)
+            cv.imshow("result", result8)
         drag_start = None
     elif drag_start:
         #print flags
-        if flags & cv2.EVENT_FLAG_LBUTTON:
+        if flags & cv.EVENT_FLAG_LBUTTON:
             minpos = min(drag_start[0], x), min(drag_start[1], y)
             maxpos = max(drag_start[0], x), max(drag_start[1], y)
             sel = minpos[0], minpos[1], maxpos[0], maxpos[1]
-            img = cv2.cvtColor(gray, cv2.COLOR_GRAY2BGR)
-            cv2.rectangle(img, (sel[0], sel[1]), (sel[2], sel[3]), (0,255,255), 1)
-            cv2.imshow("gray", img)
+            img = cv.cvtColor(gray, cv.COLOR_GRAY2BGR)
+            cv.rectangle(img, (sel[0], sel[1]), (sel[2], sel[3]), (0,255,255), 1)
+            cv.imshow("gray", img)
         else:
             print("selection is complete")
             drag_start = None
@@ -63,21 +63,21 @@ if __name__ == '__main__':
     args = parser.parse_args()
     path = args.input
 
-    cv2.namedWindow("gray",1)
-    cv2.setMouseCallback("gray", onmouse)
+    cv.namedWindow("gray",1)
+    cv.setMouseCallback("gray", onmouse)
     '''Loop through all the images in the directory'''
     for infile in glob.glob( os.path.join(path, '*.*') ):
         ext = os.path.splitext(infile)[1][1:] #get the filename extenstion
         if ext == "png" or ext == "jpg" or ext == "bmp" or ext == "tiff" or ext == "pbm":
             print(infile)
 
-            img=cv2.imread(infile,1)
+            img=cv.imread(infile,1)
             if img is None:
                 continue
             sel = (0,0,0,0)
             drag_start = None
-            gray=cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
-            cv2.imshow("gray",gray)
-            if cv2.waitKey() == 27:
+            gray=cv.cvtColor(img, cv.COLOR_BGR2GRAY)
+            cv.imshow("gray",gray)
+            if cv.waitKey() == 27:
                 break
-    cv2.destroyAllWindows()
+    cv.destroyAllWindows()