vila-lab-aaafed48·3 events·first seen Aliases: VILA-Lab
Researchers propose a training framework for detecting pixel-level image tampering in content generated by modern vision-language models such as ChatGPT, Gemini, and Qwen-Image. The approach combines balanced minibatch sampling and a late-injection strategy to improve out-of-distribution robustness without overfitting to limited new-domain data. The framework outperforms the prior state-of-the-art PIXAR method by 26.1% and 26.8% relative improvement in gIoU and cIoU respectively, evaluated on OOD VLMs including GPT-Images-2.0, Gemini-3.1, FLUX.2, and Seedream 4.5. The work is directly motivated by the growing difficulty of detecting AI-generated image manipulations as generation quality improves.
ActiveSAM is a training-free, zero-shot inference framework that wraps Segment Anything Model 3 (SAM 3) to perform open-vocabulary semantic segmentation more efficiently. It estimates an image-conditioned active class subset at low resolution before running full-resolution decoding only on retained classes, using bucketed prompt multiplexing and margin-aware background calibration. Across eight benchmarks, it outperforms the prior state-of-the-art SegEarth-OV3 by ~1.4 mIoU on average while running up to 5.5x faster on large-vocabulary datasets, with strong robustness to image corruption relevant to autonomous driving and embodied AI.
Researchers introduce OpAI-Bench, a benchmark for studying AI-text detection across progressive human-to-AI document revision workflows, covering document, sentence, token, and span granularities. Starting from human-written documents, the benchmark constructs nine sequentially revised versions per sample under five AI edit operations and varying AI coverage levels across four domains. Key findings include that mixed-authorship intermediate versions are often harder to detect than fully human or heavily AI-edited endpoints, revealing non-monotonic detection patterns absent from existing benchmarks. The work addresses a gap in AI-text detection research as real-world documents increasingly result from iterative human-AI co-editing rather than pure generation.