Read it here: Exploring the suitability of the Viola-Jones framework for counting people

Abstract
This paper explores the effectiveness of the Viola-Jones algorithm for detecting faces and the suitability of applying the algorithm to the problem of counting people, concluding that a viable solution may be possible by combining classifiers and/or by training classifiers for specific installations.

Context
This paper was written for a Computer Vision assignment. It was graded 76% (a first).