How does it work?
At a high level, machine learning is a data analysis method which uses historical data, examples and experience to devise a model to automatically predict future outcomes (instead of hard-coded rules). The key is the "learning" part: the algorithm continues to evolve to make the predictions more accurate over time.
The traditional ways of machine learning involved more manual methods of developing models and algorithms. IBM's DeepBlue, for example, was programmed to learn to play chess in the 1990's (and beat the world champion). However, chess has a relatively small and finite set of moves per position (about 20) -- fairly easy to program a computer to learn through brute force.
Fast forward to 2016 and Google's DeepMind project AlphaGo. It utilizes sophisticated neural network algorithms, and was used to defeat the Go world champion. Go has about 200 moves per position, with more possible board configurations than there are atoms in the universe! This demonstrates the power of the neural network algorithm. Most importantly, it shows that general-purpose artificial intelligence can exist.
Neural networks mimic the learning process of the human brain. The AI from DeepMind uses a technique called Deep Reinforcement Learning. It learns from experience, using raw pixels as data input. AlphaGo was shown hundreds of thousands of Go games so it could learn from human players. Then Google had the AI play against itself 30 million times. Over time, it got better; to the point where one of the algorithms had an almost 90% win-rate against the other. That was the one selected.
Naturally, a human could never play 30 million Go games in their lifetime. The machine does not get tired, nor make emotional mistakes. The AI's experience becomes super-human, despite the fact it originally learned from humans.
Watch what happens when Google used the same algorithm to train the machine on the famous Atari game Breakout. The goal given to the machine was to maximize the score it could achieve in the shortest amount of time. At first, the AI is pretty terrible at the game. However, after about 2 hours of playing, it is very good. After 6 hours it does something amazing: it becomes super human.
Swiftkey, the makers of a keyboard app for mobile devices, nicely demonstrate how a neural network helps improve their word predictions.
Using ML in your organization
The ability to plug directly into some of Google's (and others' like Microsoft and Amazon) algorithms in the cloud make ML much more accessible. I am more familiar with Google's offerings, so will highlight a few:
Google's Cloud Vision API is image recognition in the cloud. It can detect what is occurring in images (including sentiment analysis of humans). A city in Canada trained Google's AI using thousands of school bus stop sign videos. The goal was to have the machine watch the videos and identify if a vehicle went passed the bus' stop sign illegally. The algorithm was trained to identify when the sign was out and active, and when vehicles had passed through it. It turned out to be 99% effective, while humans were only 83%. This resulted in increased revenue through traffic violation tickets.
Disney used Cloud Vision for their marketing campaign for the movie Pete's Dragon. The site set children on a hunt in their homes for common objects (like chair, door, tree, clouds, etc.). Once detected by the algorithm, Elliot the dragon would magically appear on the screen.
Google's natural language processing API is something which could be leveraged in the example given in my earlier blog post on data. By analyzing millions of public social media posts for certain sentiments and cues, the sales team can potentially land deeper leads.
Google also has a translation, audio-to-text, and even a new job search API.
Lastly, Google's open-source TensorFlow is a machine learning library for numerical computation using data flow graphs. Developers can use this to build models with very little code and eventually translate them into products in Google's cloud.
The future: humans + machines
I believe the businesses which adopt and master machine learning the best will be the most successful in the future, regardless of industry. (Of course, it helps to have a lot of data to train your model.)
While ML may eliminate some jobs, I feel it will be the successful partnership of humans and machines which will bring the most fruitful benefits. Take a radiologist, for example: she may leverage ML to assess her readings faster, but also provide additional oversight for deeper analysis.
Ultimately, where the AI takes us is hard to predict, but the positive impact and advancements made will most certainly be exponential.
