Age Estimation by Refining Label Distribution in Deep CNN

This paper proposes an age estimation algorithm by refining the label distribution in a deep learning framework. There are two tasks during the training period of our algorithm. The first one finds the optimal parameters of supervised deep CNN by given the label distribution of the training sample as the ground truth, while the second one estimates the variances of label distribution to fit the output of the CNN. These two tasks are performed alternatively and both of them are treated as the supervised learning tasks. The AlexNet and ResNet-50 architectures are adopted as the classifiers and the Gaussian form of the label distribution is assumed. Experiments show that the accuracy of age estimation can be improved by refining label distribution.

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