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Ziqi Ni

2 accepted papers

2026

Seeing What Matters: Visual Preference Policy Optimization for Visual Generation

CVPR 2026

Reinforcement learning (RL) has become a powerful tool for post-training visual generative models, with Group Relative Policy Optimization (GRPO) increasingly used to align generators with human preferences. However, existing GRPO pipelines rely on a single scalar reward per sample, treating each im

Cited by 0SourceScholar
2025

Dual-Arm Hierarchical Planning for Laboratory Automation: Vibratory Sieve Shaker Operations

IROS 2025

This paper addresses the challenges of automating vibratory sieve shaker operations in a materials laboratory, focusing on three critical tasks: 1) dual-arm lid manipulation in 3 cm clearance spaces, 2) bimanual handover in overlapping workspaces, and 3) obstructed powder sample container delivery w

Cited by 0SourceScholar