added 0xFF & in front of every waitKey so that it works on linux

samples/python2/camshift.py

@@ -101,7 +101,7 @@ class App(object):
                 
             cv2.imshow('camshift', vis)
 
-            ch = cv2.waitKey(5)
+            ch = 0xFF & cv2.waitKey(5)
             if ch == 27:
                 break
             if ch == ord('b'):

samples/python2/coherence.py

@@ -65,7 +65,7 @@ if __name__ == '__main__':
     cv2.imshow('src', src)
     update()
     while True:
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == ord(' '):
             update()
         if ch == 27:

samples/python2/color_histogram.py

@@ -42,6 +42,6 @@ if __name__ == '__main__':
         vis = hsv_map*h[:,:,np.newaxis] / 255.0
         cv2.imshow('hist', vis)
         
-        ch = cv2.waitKey(1)
+        ch = 0xFF & cv2.waitKey(1)
         if ch == 27:
             break

samples/python2/contours.py

@@ -45,4 +45,4 @@ if __name__ == '__main__':
     update(3)
     cv2.createTrackbar( "levels+3", "contours", 3, 7, update )
     cv2.imshow('image', img)
-    cv2.waitKey()
+    0xFF & cv2.waitKey()

samples/python2/distrans.py

@@ -44,7 +44,7 @@ if __name__ == '__main__':
 
 
     while True:
-        ch = cv2.waitKey(50)
+        ch = 0xFF & cv2.waitKey(50)
         if ch == 27:
             break
         if ch == ord('v'):

samples/python2/facedetect.py

@@ -54,6 +54,6 @@ if __name__ == '__main__':
         draw_str(vis, (20, 20), 'time: %.1f ms' % (dt*1000))
         cv2.imshow('facedetect', vis)
 
-        if cv2.waitKey(5) == 27:
+        if 0xFF & cv2.waitKey(5) == 27:
             break
 

samples/python2/feature_homography.py

@@ -85,7 +85,7 @@ if __name__ == '__main__':
             draw_str(vis, (20, 40), 'matched: %d ( %d outliers )' % (match_n, match_n-inlier_n))
         
         cv2.imshow('img', vis)
-        ch = cv2.waitKey(1)
+        ch = 0xFF & cv2.waitKey(1)
         if ch == ord(' '):
             matcher.clear()
             matcher.add([desc])

samples/python2/find_obj.py

@@ -99,4 +99,4 @@ if __name__ == '__main__':
                                                    # neighbours, so r_threshold is decreased
     cv2.imshow('find_obj SURF', vis_brute)
     cv2.imshow('find_obj SURF flann', vis_flann)
-    cv2.waitKey()
+    0xFF & cv2.waitKey()

samples/python2/floodfill.py

@@ -51,7 +51,7 @@ if __name__ == '__main__':
     cv2.createTrackbar('hi', 'floodfill', 20, 255, update)
 
     while True:
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == 27:
             break
         if ch == ord('f'):

samples/python2/gaussian_mix.py

@@ -51,6 +51,6 @@ if __name__ == '__main__':
             draw_gaussain(img, m, cov, (0, 0, 255))
 
         cv2.imshow('gaussian mixture', img)
-        ch = cv2.waitKey(0)
+        ch = 0xFF & cv2.waitKey(0)
         if ch == 27:
             break

samples/python2/inpaint.py

@@ -22,7 +22,7 @@ if __name__ == '__main__':
     sketch = Sketcher('img', [img_mark, mark], lambda : ((255, 255, 255), 255))
 
     while True:
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == 27:
             break
         if ch == ord(' '):

samples/python2/lk_homography.py

@@ -85,7 +85,7 @@ class App:
                 
             cv2.imshow('lk_homography', vis)
 
-            ch = cv2.waitKey(1)
+            ch = 0xFF & cv2.waitKey(1)
             if ch == 27:
                 break
             if ch == ord(' '):

samples/python2/lk_track.py

@@ -81,7 +81,7 @@ class App:
             self.prev_gray = frame_gray
             cv2.imshow('lk_track', vis)
 
-            ch = cv2.waitKey(1)
+            ch = 0xFF & cv2.waitKey(1)
             if ch == 27:
                 break
 

samples/python2/morphology.py

@@ -48,7 +48,7 @@ if __name__ == '__main__':
     print "  2 - change structure element shape"
     print
     while True:
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == 27:
             break
         if ch == ord('1'):

samples/python2/motempl.py

@@ -76,5 +76,5 @@ if __name__ == '__main__':
         cv2.imshow('motempl', vis)
 
         prev_frame = frame.copy()
-        if cv2.waitKey(5) == 27:
-            break
+        if 0xFF & cv2.waitKey(5) == 27:
+            break

samples/python2/mser.py

@@ -33,5 +33,5 @@ if __name__ == '__main__':
         cv2.polylines(vis, hulls, 1, (0, 255, 0))
 
         cv2.imshow('img', vis)
-        if cv2.waitKey(5) == 27:
-            break
+        if 0xFF & cv2.waitKey(5) == 27:
+            break

samples/python2/opt_flow.py

@@ -69,7 +69,7 @@ if __name__ == '__main__':
             cur_glitch = warp_flow(cur_glitch, flow)
             cv2.imshow('glitch', cur_glitch)
 
-        ch = cv2.waitKey(5)
+        ch = 0xFF & cv2.waitKey(5)
         if ch == 27:
             break
         if ch == ord('1'):

samples/python2/peopledetect.py

@@ -50,6 +50,6 @@ if __name__ == '__main__':
         draw_detections(img, found_filtered, 3)
         print '%d (%d) found' % (len(found_filtered), len(found))
         cv2.imshow('img', img)
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == 27:
             break

samples/python2/squares.py

@@ -34,6 +34,6 @@ if __name__ == '__main__':
         squares = find_squares(img)
         cv2.drawContours( img, squares, -1, (0, 255, 0), 3 )
         cv2.imshow('squares', img)
-        ch = cv2.waitKey()
+        ch = 0xFF & cv2.waitKey()
         if ch == 27:
-            break
+            break

samples/python2/turing.py

@@ -60,5 +60,5 @@ if __name__ == '__main__':
         vis = a.copy()
         draw_str(vis, (20, 20), 'frame %d' % frame_i)
         cv2.imshow('a', vis)
-        if cv2.waitKey(5) == 27:
+        if 0xFF & cv2.waitKey(5) == 27:
             break

samples/python2/video.py

@@ -156,7 +156,7 @@ if __name__ == '__main__':
             ret, img = cap.read()
             imgs.append(img)
             cv2.imshow('capture %d' % i, img)
-        ch = cv2.waitKey(1)
+        ch = 0xFF & cv2.waitKey(1)
         if ch == 27:
             break
         if ch == ord(' '):

samples/python2/watershed.py

@@ -37,7 +37,7 @@ class App:
 
     def run(self):
         while True:
-            ch = cv2.waitKey(50)
+            ch = 0xFF & cv2.waitKey(50)
             if ch == 27:
                 break
             if ch >= ord('1') and ch <= ord('7'):