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Sanghyeon Lee

8 accepted papers

2026

LLM-Guided Communication for Cooperative Multi-Agent Reinforcement Learning

ICML 2026poster

Communication is a key component in multi-agent reinforcement learning (MARL) for mitigating partial observability, yet prior approaches often rely on inefficient information exchange or fail to transmit sufficient state information. To address this, we propose LLM-driven Multi-Agent Communication (…

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2026

OPRO: Orthogonal Panel-Relative Operators for Panel-Aware In-Context Image Generation

CVPR 2026

We introduce a parameter-efficient adaptation method for panel-aware in-context image generation with pre-trained diffusion transformers. The key idea is to compose learnable, panel-specific orthogonal operators onto the backbone's frozen positional encodings. This design provides two desirable prop

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2026

Self-Improving Skill Learning for Robust Skill-based Meta-Reinforcement Learning

ICLR 2026poster

Meta-reinforcement learning (Meta-RL) facilitates rapid adaptation to unseen tasks but faces challenges in long-horizon environments. Skill-based approaches tackle this by decomposing state-action sequences into reusable skills and employing hierarchical decision-making. However, these methods are h…

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2026

Strict Subgoal Execution: Reliable Long-Horizon Planning in Hierarchical Reinforcement Learning

ICLR 2026poster

Long-horizon goal-conditioned tasks pose fundamental challenges for reinforcement learning (RL), particularly when goals are distant and rewards are sparse. While hierarchical and graph-based methods offer partial solutions, their reliance on conventional hindsight relabeling often fails to correct…

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2025

Enabling Region-Specific Control via Lassos in Point-Based Colorization

AAAI 2025technical

Point-based interactive colorization techniques allow users to effortlessly colorize grayscale images using user-provided color hints. However, point-based methods often face challenges when different colors are given to semantically similar areas, leading to color intermingling and unsatisfactory r…

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2024

Exclusively Penalized Q-learning for Offline Reinforcement Learning

NeurIPS 2024spotlight

Constraint-based offline reinforcement learning (RL) involves policy constraints or imposing penalties on the value function to mitigate overestimation errors caused by distributional shift. This paper focuses on a limitation in existing offline RL methods with penalized value function, indicating t…

Cited by 2Source ↗PDF ↗Scholar ↗
2021

Deep Edge-Aware Interactive Colorization Against Color-Bleeding Effects

ICCV 2021poster

Deep neural networks for automatic image colorization often suffer from the color-bleeding artifact, a problematic color spreading near the boundaries between adjacent objects. Such color-bleeding artifacts debase the reality of generated outputs, limiting the applicability of colorization models in…

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2021

Efficient Adversarial Audio Synthesis VIA Progressive Upsampling

ICASSP 2021accepted

This paper proposes a novel generative model called PUGAN, which progressively synthesizes high-quality audio in a raw waveform. Progressive upsampling GAN (PUGAN) leverages the progressive generation of higher-resolution output by stacking multiple encoder-decoder architectures. Compared to an exis…

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