Partitioning of image datasets using discriminative context information

C. Lampert, in:, IEEE, 2008, pp. 1–8.

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Abstract
We propose a new method to partition an unlabeled dataset, called Discriminative Context Partitioning (DCP). It is motivated by the idea of splitting the dataset based only on how well the resulting parts can be separated from a context class of disjoint data points. This is in contrast to typical clustering techniques like K-means that are based on a generative model by implicitly or explicitly searching for modes in the distribution of samples. The discriminative criterion in DCP avoids the problems that density based methods have when the a priori assumption of multimodality is violated, when the number of samples becomes small in relation to the dimensionality of the feature space, or if the cluster sizes are strongly unbalanced. We formulate DCP‘s separation property as a large-margin criterion, and show how the resulting optimization problem can be solved efficiently. Experiments on the MNIST and USPS datasets of handwritten digits and on a subset of the Caltech256 dataset show that, given a suitable context, DCP can achieve good results even in situation where density-based clustering techniques fail.
Publishing Year
Date Published
2008-09-18
Acknowledgement
This work was funded in part by the EC project CLASS, IST 027978.
Page
1 - 8
Conference
CVPR: Computer Vision and Pattern Recognition
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Cite this

Lampert C. Partitioning of image datasets using discriminative context information. In: IEEE; 2008:1-8. doi:10.1109/CVPR.2008.4587448
Lampert, C. (2008). Partitioning of image datasets using discriminative context information (pp. 1–8). Presented at the CVPR: Computer Vision and Pattern Recognition, IEEE. https://doi.org/10.1109/CVPR.2008.4587448
Lampert, Christoph. “Partitioning of Image Datasets Using Discriminative Context Information,” 1–8. IEEE, 2008. https://doi.org/10.1109/CVPR.2008.4587448.
C. Lampert, “Partitioning of image datasets using discriminative context information,” presented at the CVPR: Computer Vision and Pattern Recognition, 2008, pp. 1–8.
Lampert C. 2008. Partitioning of image datasets using discriminative context information. CVPR: Computer Vision and Pattern Recognition 1–8.
Lampert, Christoph. Partitioning of Image Datasets Using Discriminative Context Information. IEEE, 2008, pp. 1–8, doi:10.1109/CVPR.2008.4587448.

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