Computer vision and convolutional neural networks

Computer vision is a key aspect of artificial intelligence that is critical to many applications, from robots movements to self-driving cars and from medical imaging to products recognition in manufacturing plants. This MIT course presents the issues of computer vision and how they are handled with Convolutional Neural Networks together with the latest domains of research and state-of-the-art algorithms architectures.

image classification by a computer

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Conceptual and mathematical summary for machine learning

Machine learning makes use of multiple mathematical formulas and relations to implement the different tasks it can handle. Gathered in the following “cheat sheets” by Afshine and Shervine Amidi, the concepts for supervised and unsupervised learning, deep learning together with machine learning tips and tricks, probabilities, statistics algebra and calculus reminders, are all presented in details with the underlying math.

Gradient descent diagram

Based on the Stanford course on Machine Learning (CS 229), the cheat sheets summarize the important concepts of each branch with simple explanations and diagrams, such as the following table cover underfitting and overfitting.

UnderfittingJust rightOverfitting
Symptoms• High training error
• Training error close to test error
• High bias
• Training error slightly lower than test error• Very low training error
• Training error much lower than test error
• High variance
Regression illustrationIllustrationIllustrationIllustration
Classification illustrationIllustrationIllustrationIllustration
Deep learning illustrationIllustrationIllustrationIllustration
Possible remedies• Complexify model
• Add more features
• Train longer
• Perform regularization
• Get more data

The main machine learning cheat sheets can be found here:

Other mathematics and coding cheat sheets can be found here:

The complete cheat sheets can also be found on Github.

Catalogue of neural networks architectures

Neural networks come in a wide range of shapes and functions, with diverse architectures and parameters for input, hidden and output nodes as well as convolutive or recurrent nodes.

Overview of the most popular neural networks
Overview of the most popular neural networks

Regrouped in a convenient summary by Fjodor Van Veen, the most popular architectures for neural networks have been cataloged with detailed descriptions for each type of neural network. The complete post with explanations on the use and goals of each network can be be found on the Asimov Institute “the neural network zoo“.