unsupervised learning

Learning representative and discriminative image representation by deep appearance and spatial coding

How to build a suitable image representation remains a critical problem in computer vision. Traditional Bag-of-Feature (BoF) based models build image representation by the pipeline of local feature extraction, feature coding and spatial pooling. …

Regularized Hierarchical Feature Learning with Non-negative Sparsity and Selectivity for Image Classification

Recently, many deep networks are proposed to learn hierarchical image representation to replace traditional hand-designed features. To enhance the ability of the generative model to tackle discriminative computer vision tasks (e.g. image …