Search Results for author: Zhongwen Zhang

Found 4 papers, 0 papers with code

Collision Cross-entropy for Soft Class Labels and Deep Clustering

no code implementations13 Mar 2023 Zhongwen Zhang, Yuri Boykov

We propose "collision cross-entropy" as a robust alternative to Shannon's cross-entropy (CE) loss when class labels are represented by soft categorical distributions y.

Clustering Deep Clustering +2

Discriminative Entropy Clustering and its Relation to K-means and SVM

no code implementations26 Jan 2023 Zhongwen Zhang, Yuri Boykov

Maximization of mutual information between the model's input and output is formally related to "decisiveness" and "fairness" of the softmax predictions, motivating these unsupervised entropy-based criteria for clustering.

Clustering Deep Clustering +3

Confluent Vessel Trees with Accurate Bifurcations

no code implementations CVPR 2021 Zhongwen Zhang, Dmitrii Marin, Maria Drangova, Yuri Boykov

We are interested in unsupervised reconstruction of complex near-capillary vasculature with thousands of bifurcations where supervision and learning are infeasible.

Divergence Prior and Vessel-tree Reconstruction

no code implementations CVPR 2019 Zhongwen Zhang, Egor Chesakov, Dmitrii Marin, Yuri Boykov

We propose a new geometric regularization principle for reconstructing vector fields based on prior knowledge about their divergence.

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