3.5　參考文獻及網頁鏈接

[1] Getting Started with Images?. Getting Started with Images — OpenCV-Python Tutorials 1 documentation. Available at: http://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_gui/py_image_display/py_image_display.html.

[2] Histogram of Oriented Gradients. Histogram of Oriented Gradients — skimage v0.14dev docs. Available at: http://scikit-image.org/docs/dev/auto_examples/features_detection/plot_hog.html.

[3] Hough Circle Transform. Hough Circle Transform — OpenCV 2.4.13.3 documentation. Available at:http://docs.opencv.org/2.4/doc/tutorials/imgproc/imgtrans/hough_circle/hough_circle.html.

[4] Mallick, S. Home. Learn OpenCV (2016). Available at: http://www.learnopencv.com/histogram-of-oriented-gradients/.

[5] Sobel Derivatives. Sobel Derivatives OpenCV 2.4.13.3 documentation. Available at: http://docs.opencv.org/2.4/doc/tutorials/imgproc/imgtrans/sobel_derivatives/sobel_derivatives.html.

[6] Udacity. udacity/CarND-Vehicle-Detection. GitHub (2017). Available at: https://github.com/ udacity/CarND-Vehicle-Detection.

[7] tf.estimator Quickstart | TensorFlow. TensorFlow. Available at: https://www.tensorflow.org/ get_started/estimator.