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We present a systematic study on gender classification with automatically detected and aligned faces. We experimented with 120 combinations of automatic face detection, face alignment and gender classification. One of the findings was that the automatic face alignment methods did not increase the gender classification rates. However, manual alignment increased classification rates a little, which suggests that automatic alignment would be useful when the alignment methods are further improved. We also found that the gender classification methods performed almost equally well with different input image sizes. In any case, the best classification rate was achieved with a support vector machine. A neural network and Adaboost achieved almost as good classification rates as the support vector machine and could be used in applications where classification speed is considered more important than the best possible classification accuracy.
Classifier design and evaluation, Computer vision, Face and gesture recognition, Interactive systems, Vision I/O, Machine learning

R. Raisamo and E. M?kinen, "Evaluation of Gender Classification Methods with Automatically Detected and Aligned Faces," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 30, no. , pp. 541-547, 2007.
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