[OpenCV] Color and Shape Detection

趕快惡補一下：

Ball Tracking with OpenCV
http://www.pyimagesearch.com/2015/09/14/ball-tracking-with-opencv/

OpenCV shape detection
http://www.pyimagesearch.com/2016/02/08/opencv-shape-detection/

Basic motion detection and tracking with Python and OpenCV
http://www.pyimagesearch.com/2015/05/25/basic-motion-detection-and-tracking-with-python-and-opencv/

Determining object color with OpenCV
http://www.pyimagesearch.com/2016/02/15/determining-object-color-with-opencv/

OpenCV Track Object Movement
http://www.pyimagesearch.com/2015/09/21/opencv-track-object-movement/

OpenCV and Python Color Detection
http://www.pyimagesearch.com/2014/08/04/opencv-python-color-detection/

Detecting Circles in Images using OpenCV and Hough Circles
http://www.pyimagesearch.com/2014/07/21/detecting-circles-images-using-opencv-hough-circles/

Home surveillance and motion detection with the Raspberry Pi, Python, OpenCV, and Dropbox
http://www.pyimagesearch.com/2015/06/01/home-surveillance-and-motion-detection-with-the-raspberry-pi-python-and-opencv/

Basic motion detection and tracking with Python and OpenCV
http://www.pyimagesearch.com/2015/05/25/basic-motion-detection-and-tracking-with-python-and-opencv/