General article:

How computers got shockingly good at recognizing images

CS231n: Convolutional Neural Networks for Visual Recognition

• hacker's guide to neural nets - by Andrej Karpathy

The guide above became a course at Stanford. The entire lecture series is on line:

• Stanford University CS231n, Spring 2017
• CS231n class notes

Michael Nielsen's book on neural networks

• michael nielsen's book on neural networks

Referenced in the article at the start of this page, Michael Nielsen's book on neural networks is relevant, clear, and practical.

Other external links:

• https://austingwalters.com/neural-networks-to-production-from-an-engineer/
• https://greenteapress.com/wp/ (similar but different... think python, think bayes and other free books)
• TensorFlow.js — Real-Time Object Detection in 10 Lines of Code