In this paper we present two improvements over Viola and Jones [1] training scheme for face detection. The first is 300-fold speed improvement over the training method presented by Viola and Jones [1] with a modest increase in execution time. The second is a principled method for determining a cascade classifier of optimal speed. We present some preliminary results of our methods.

to be the soloist in William Walton's Viola Concerto. Perhaps it's more a fantasy, than an ambition, as I'm not a good enough viola player to manage it. But if I were to have a go, my main experience of learning things has been in medicine. Is learning music the same? Perhaps I should start by writing some competency statements. Let's assume, that in order to start the module 'Walton's Viola Co...

This paper examines the Asymmetric AdaBoost algorithm introduced by Viola and Jones for cascaded face detection. The Viola and Jones face detector uses cascaded classifiers to successively filter, or reject, non-faces. In this approach most non-faces are easily rejected by the earlier classifiers in the cascade, thus reducing the overall number of computations. This requires earlier cascade cla...

The first task to be carried out in an automatic surveillance system involves the detection of all the faces in the images taken by the video cameras. Current face detection algorithms are highly reliable and thus, they will not be the focus of our work. Some of the best performing examples are the Viola-Jones algorithm (Viola & Jones, 2004) or the Schneiderman-Kanade algorithm (Schneiderman & ...

"Fiddler's neck" is an irritant contact dermatitis that frequently affects violin and viola players. The etiology of the skin changes associated with this condition are probably attributable to a combination of factors--including increased pressure, friction, poor hygiene, and excessive perspiration. Clinically, the lesions generally consist of a localized area of lichenification on the left si...

In this report we summarise our experiments with ADABOOST and its application to the problem of face detection. As a starting point, the Viola-Jones face detector ([1]) is reimplemented and some details of the implementation are discussed. Next, modifications of both the training and detection procedure are reported. In the learning phase, tenfold decrease in training time, without noticeable r...

A trained cascade for face detection with a reduced number of Haar-like features should be computationally efficient. The accurate classical scheme for selecting these Haar-like features is proposed by Viola and Jones, but the training process may take weeks. Recently, there have been several heuristics reducing the training time in a dramatic way but the selected weak classifiers are not as go...