Graph Degree Linkage: Agglomerative Clustering on a Directed Graph
This paper proposes a simple but effective graph-based agglomerative algorithm, for clustering high-dimensional data. We explore the different roles of two fundamental concepts in graph theory, indegree and outdegree, in the context of clustering. The average indegree reflects the density near a sample, and the average outdegree characterizes the local geometry around a sample. Based on such insights, we define the affinity measure of clusters via the product of average indegree and average outdegree. The product-based affinity makes our algorithm robust to noise. The algorithm has three main advantages: good performance, easy implementation, and high computational efficiency. We test the algorithm on two fundamental computer vision problems: image clustering and object matching. Extensive experiments demonstrate that it outperforms the state-of-the-arts in both applications.
PDF AbstractCode
Datasets
MNIST
Fashion-MNIST
USPS
Extended Yale B
COIL-20
COIL-100
Results from the Paper
Ranked #1 on
Image Clustering
on Coil-20
(Accuracy metric)
