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Ran Zuo

4 accepted papers

2026

Group Causal Policy Optimization for Post-Training Large Language Models

AAAI 2026technical

Recent advances in large language models (LLMs) have broadened their applicability across diverse tasks, yet specialized domains still require targeted post-training. Among existing methods, Group Relative Policy Optimization (GRPO) stands out for its efficiency, leveraging groupwise relative reward

Cited by 0SourcePDFScholar
2026

SketchRevive: Fine-Grained Pixel-to-Vector Sketch Completion with Diffusion-Prior-Guided Multimodal LLMs

CVPR 2026

Transforming sparse, partial pixel sketches from diverse media into complete, editable vector drawings is essential yet underexplored in digital creation. Prior methods either generate from scratch or inpaint local gaps without predicting global structure, leading to coarse contours and limited deta

Cited by 0SourceScholar
2024

SceneDiff: Generative Scene-Level Image Retrieval with Text and Sketch Using Diffusion Models

IJCAI 2024poster

Jointly using text and sketch for scene-level image retrieval utilizes the complementary between text and sketch to describe the fine-grained scene content and retrieve the target image, which plays a pivotal role in accurate image retrieval. Existing methods directly fuse the features of sketch and…

Cited by 0SourcePDFScholar
2020

SceneSketcher: Fine-Grained Image Retrieval with Scene Sketches

ECCV 2020poster

Sketch-based image retrieval (SBIR) has been a popular research topic in recent years. Existing works concentrate on mapping the visual information of sketches and images to a semantic space at the object level. In this paper, for the first time, we study the fine-grained scene-level SBIR problem wh…

Cited by 45SourcePDFScholar