INSIGHT: An Interpretable Neural Vision-Language Framework for Reasoning of Generative Artifacts

TL;DR

INSIGHT is a multimodal framework that enhances detection and provides transparent, human-interpretable explanations for AI-generated images, even at very low resolutions, improving trust and reliability in media forensics.

Contribution

It introduces a novel, interpretable, multimodal approach combining super-resolution, localization, semantic alignment, and reasoning protocols for robust AI-generated image detection and explanation.

Findings

Outperforms prior detectors in robustness and explanation quality.

Effective at extremely low resolutions (16x16 to 64x64).

Provides human-interpretable explanations verified by a dual-stage evaluation.

Abstract

The growing realism of AI-generated images produced by recent GAN and diffusion models has intensified concerns over the reliability of visual media. Yet, despite notable progress in deepfake detection, current forensic systems degrade sharply under real-world conditions such as severe downsampling, compression, and cross-domain distribution shifts. Moreover, most detectors operate as opaque classifiers, offering little insight into why an image is flagged as synthetic, undermining trust and hindering adoption in high-stakes settings. We introduce INSIGHT (Interpretable Neural Semantic and Image-based Generative-forensic Hallucination Tracing), a unified multimodal framework for robust detection and transparent explanation of AI-generated images, even at extremely low resolutions (16x16 - 64x64). INSIGHT combines hierarchical super-resolution for amplifying subtle forensic cues without inducing misleading artifacts, Grad-CAM driven multi-scale localization to reveal spatial regions indicative of generative patterns, and CLIP-guided semantic alignment to map visual anomalies to human-interpretable descriptors. A vision-language model is then prompted using a structured ReAct + Chain-of-Thought protocol to produce consistent, fine-grained explanations, verified through a dual-stage G-Eval + LLM-as-a-judge pipeline to minimize hallucinations and ensure factuality. Across diverse domains, including animals, vehicles, and abstract synthetic scenes, INSIGHT substantially improves both detection robustness and explanation quality under extreme degradation, outperforming prior detectors and black-box VLM baselines. Our results highlight a practical path toward transparent, reliable AI-generated image forensics and establish INSIGHT as a step forward in trustworthy multimodal content verification.