Author

Cong Tran

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Open access 2026

A4O-Attack: All Triggers for One Sample Backdoor Attacks

This paper designs a novel backdoor attack mechanism that incorporates multiple types of backdoor trigger, focusing on stealthiness and effectiveness, and proposes reducing the magnitude of each trigger type and combining them to achieve a strong backdoor relying on the combined trigger while still staying safely under the radar of defenders.

Duc Anh Vu, Vuong Quoc Anh Pham, Le Hoang Nguyen et al. · IEEE Access · 0 citations

Preprint Aug 2026

SpatialQuery: Benchmarking Geometry-Grounded Multi-Instance Spatial Reasoning in Vision-Language Models

This work introduces SPATIALQUERY, a training- free framework for CIDQ reasoning from a single RGB image, together with SPATIALQUERY-1M, a benchmark containing over one million RGB-only question-answer pairs from 200 indoor scenes, and proposes Uncertainty-Aware Chain-of-Thought (UA-CoT) prompting, which incorporates geometry- derived per-instance uncertainty into the VLM reasoning process.

Hai-Tra Nguyen, Tung Vu, C. Tran · 0 citations