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Hiroshi Higashi

2 papers indexed

arxivcs.CV2026-07-17

WREN: Low Light Image Enhancement Using Retinex theory-based Double U-Net-like Structures

Reina Kaneko, Junya Hara, Hiroshi Higashi, Yuichi Tanaka

This paper proposes a neural network for low light image enhancement (LLIE) based on retinex theory to make LLIE robust for various dynamic range scenes. The retinex theory is an image formulation model inspired by a human color perception hypothesis, where a low light image is d…

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arxivcs.ITeess.SP2026-07-16

Lossy compression of weighted graph adjacency matrices by transform coding

Kenta Yanagiya, Junya Hara, Hiroshi Higashi, Yuichi Tanaka, Antonio Ortega

In this paper, we propose a compression framework for weighted graphs in which the graph topology is transmitted losslessly and edge weights are compressed lossily. A challenge in the lossy compression of edge weights is that the underlying relationships between edges are ambiguo…

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