Image classification by semisupervised sparse coding with confident unlabeled samples

Xiao Li; Min Fang; Jinqiao Wu; Liang He; Xian Tian

doi:10.1117/1.JEI.26.5.053013

20 September 2017 Image classification by semisupervised sparse coding with confident unlabeled samples

Xiao Li, Min Fang, Jinqiao Wu, Liang He, Xian Tian

Author Affiliations +

Journal of Electronic Imaging, Vol. 26, Issue 5, 053013 (September 2017). https://doi.org/10.1117/1.JEI.26.5.053013

Abstract

Sparse coding has achieved very excellent performance in image classification tasks, especially when the supervision information is incorporated into the dictionary learning process. However, there is a large amount of unlabeled samples that are expensive and boring to annotate. We propose an image classification algorithm by semisupervised sparse coding with confident unlabeled samples. In order to make the learnt sparse coding more discriminative, we select and annotate some confident unlabeled samples. A minimization model is developed in which the reconstruction error of the labeled, the selected unlabeled and the remaining unlabeled data and the classification error are integrated, which enhances the discriminant property of the dictionary and sparse representations. The experimental results on image classification tasks demonstrate that our algorithm can significantly improve the image classification performance.

Citation Download Citation

Xiao Li, Min Fang, Jinqiao Wu, Liang He, and Xian Tian "Image classification by semisupervised sparse coding with confident unlabeled samples," Journal of Electronic Imaging 26(5), 053013 (20 September 2017). https://doi.org/10.1117/1.JEI.26.5.053013

Received: 9 March 2017; Accepted: 28 July 2017; Published: 20 September 2017

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