Publication

Tracking millions of humans

Alexandre Massoud Alahi
2017
Book Chapters

Abstract

In this chapter, we present all the technical details that lead to successfully understanding the mobility of more than a hundred million individuals in crowded train terminals over the course of two years. We cover the full spectrum of an intelligent system that detects and tracks humans in high density crowds using a camera network. We share detailed insights on how to address the occlusion problem with sparsity promoting priors and discrete combinatorial optimization that models social interactions.

Official source

https://infoscience.epfl.ch/entities/publication/39243c9a-3412-4786-822f-ce11a2d79081

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Alexandre Massoud Alahi
2017
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/39243c9a-3412-4786-822f-ce11a2d79081

About this result

Related concepts (32)

Combinatorial optimization

Combinatorial optimization is a subfield of mathematical optimization that consists of finding an optimal object from a finite set of objects, where the set of feasible solutions is discrete or can be reduced to a discrete set. Typical combinatorial optimization problems are the travelling salesman problem ("TSP"), the minimum spanning tree problem ("MST"), and the knapsack problem. In many such problems, such as the ones previously mentioned, exhaustive search is not tractable, and so specialized algorithms that quickly rule out large parts of the search space or approximation algorithms must be resorted to instead.

Intelligent transportation system

An intelligent transportation system (ITS) is an advanced application which aims to provide innovative services relating to different modes of transport and traffic management and enable users to be better informed and make safer, more coordinated, and 'smarter' use of transport networks. Some of these technologies include calling for emergency services when an accident occurs, using cameras to enforce traffic laws or signs that mark speed limit changes depending on conditions.

Lead

Lead is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements.

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