Updated video sub-package to be compatible with Python 3; made vide…

…o using daemon threads

MANIFEST

@@ -10,3 +10,8 @@ imutils/meta.py
 imutils/object_detection.py
 imutils/paths.py
 imutils/perspective.py
+imutils/video/__init__.py
+imutils/video/fps.py
+imutils/video/pivideostream.py
+imutils/video/videostream.py
+imutils/video/webcamvideostream.py

imutils/contours.py

@@ -4,7 +4,6 @@
 # import the necessary packages
 import cv2
 
-
 def sort_contours(cnts, method="left-to-right"):
     # initialize the reverse flag and sort index
     reverse = False

imutils/video/__init__.py

@@ -1,4 +1,4 @@
 # import the necessary packages
-from fps import FPS
-from videostream import VideoStream
-from webcamvideostream import WebcamVideoStream
+from .fps import FPS
+from .videostream import VideoStream
+from .webcamvideostream import WebcamVideoStream

imutils/video/pivideostream.py

@@ -21,7 +21,9 @@ def __init__(self, resolution=(320, 240), framerate=32):
 
 	def start(self):
 		# start the thread to read frames from the video stream
-		Thread(target=self.update, args=()).start()
+		t = Thread(target=self.update, args=())
+		t.daemon = True
+		t.start()
 		return self
 
 	def update(self):

imutils/video/videostream.py

@@ -1,5 +1,5 @@
 # import the necessary packages
-from webcamvideostream import WebcamVideoStream
+from .webcamvideostream import WebcamVideoStream
 
 class VideoStream:
 	def __init__(self, src=0, usePiCamera=False, resolution=(320, 240),
@@ -10,7 +10,7 @@ def __init__(self, src=0, usePiCamera=False, resolution=(320, 240),
 			# explicity told to do so -- this helps remove the
 			# requirement of `picamera[array]` from desktops or
 			# laptops that still want to use the `imutils` package
-			from pivideostream import PiVideoStream
+			from .pivideostream import PiVideoStream
 
 			# initialize the picamera stream and allow the camera
 			# sensor to warmup

imutils/video/webcamvideostream.py

@@ -15,7 +15,9 @@ def __init__(self, src=0):
 
 	def start(self):
 		# start the thread to read frames from the video stream
-		Thread(target=self.update, args=()).start()
+		t = Thread(target=self.update, args=())
+		t.daemon = True
+		t.start()
 		return self
 
 	def update(self):

setup.py

@@ -3,7 +3,7 @@
 setup(
     name='imutils',
     packages=['imutils', 'imutils.video'],
-    version='0.3.3',
+    version='0.3.4',
     description='A series of convenience functions to make basic image processing functions such as translation, rotation, resizing, skeletonization, displaying Matplotlib images, sorting contours, detecting edges, and much more easier with OpenCV and both Python 2.7 and Python 3.',
     author='Adrian Rosebrock',
     author_email='[email protected]',