Image Thresholding in Python

I found this article to be very useful.

http://opencv-python-tutroals.readthedocs.org/en/latest/py_tutorials/py_imgproc/py_thresholding/py_thresholding.html

CS231n: Convolutional Neural Networks for Visual Recognition Winter Course Project Report

There are lots of interesting reads on this page.   And this is a great course to take if you are research deep learning for image processing.