Papers › One Millisecond Face Alignment with an Ensemble of Regression Trees

One Millisecond Face Alignment with an Ensemble of Regression Trees

1 Jun 2014CVPR 2014 6archive 2025-07-28

Vahid Kazemi, Josephine Sullivan

This paper addresses the problem of Face Alignment for a single image. We show how an ensemble of regression trees can be used to estimate the face's landmark positions directly from a sparse subset of pixel intensities, achieving super-realtime performance with high quality predictions. We present a general framework based on gradient boosting for learning an ensemble of regression trees that optimizes the sum of square error loss and naturally handles missing or partially labelled data. We show how using appropriate priors exploiting the structure of image data helps with efficient feature selection. Different regularization strategies and its importance to combat overfitting are also investigated. In addition, we analyse the effect of the quantity of training data on the accuracy of the predictions and explore the effect of data augmentation using synthesized data.

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