Ahmed Imteaj
Author directory2026
Do LVLMs Know When They Are Wrong? Trajectory-Based Correctness Estimation from a Single Forward Pass
Awal Ahmed Fime | Md Zarif Hossain | Ahmed Imteaj
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Awal Ahmed Fime | Md Zarif Hossain | Ahmed Imteaj
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Large vision-language models (LVLMs) exhibit strong multimodal reasoning capabilities, yet reliably estimating whether a generated response is correct remains a fundamental challenge. Existing confidence estimation methods commonly rely on repeated querying, self-consistency sampling, or layer-wise probing, which introduce additional inference overhead, self-preference bias, or costly full-depth analysis. In this work, we propose a trajectory-based framework for estimating LVLM response correctness from a single forward generation pass. Instead of treating internal representations as isolated layer-wise signals, we model response generation as a structured trajectory through the LVLM, capturing the evolution of visual evidence in the vision encoder, geometric transformations induced by cross-modal projection, and probability dynamics within the language decoder. Our key insight is that response correctness is encoded in the geometry and dynamics of these component-specific trajectories. Based on this observation, we derive lightweight trajectory descriptors for each major LVLM module and integrate them through a calibrated correctness estimator trained with as few as 500 labeled examples. At test time, our method requires no additional inference passes and no ground-truth labels. Extensive experiments across multiple LVLM architectures and benchmark datasets demonstrate consistent improvements over existing baselines, including up to 16.44 higher AUROC on Qwen-2B over VisWiz and 15.61 higher AUPR on LLaVA-Next-7B over ScienceQA compared to the strongest competing methods.
Edits in the Wild: A Multilingual Benchmark for Localizing On-Device Generative Image Edits on Consumer Platforms
Mohd. Farhan Israk Soumik | Awal Ahmed Fime | Malithi Mithsara Wanniarachchi Kankanamge | Arun Babu Aryal | Hoda Joudi Haghighi | Bibek Koirala | Ahmed Imteaj | Abdur R. Shahid
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Mohd. Farhan Israk Soumik | Awal Ahmed Fime | Malithi Mithsara Wanniarachchi Kankanamge | Arun Babu Aryal | Hoda Joudi Haghighi | Bibek Koirala | Ahmed Imteaj | Abdur R. Shahid
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Consumer devices now ship with generative image editing tools that can remove objects, move subjects, and create new visual content directly on phones, tablets, and laptops. Yet current benchmarks largely miss this setting: real on-device edits produced by black-box consumer generative AI editing tools, with variation across platforms, devices, edit operations, and post-edit compression. We introduce ConsumerGenEdit, a large-scale multilingual benchmark for language-guided localization of on-device generative image edits. The dataset contains 4,000 royalty-free source images and 48,000 manually edited images created on Apple, Google, and Samsung devices, covering object removal, object movement, and sketch-based object generation. To study robustness under realistic sharing conditions, we add 144,000 learned-compression variants at three quality levels. Each example includes platform, device, editing operation, compression metadata, bounding-box annotations, and edit descriptions in English, Bangla, and Persian/Farsi generated with five vision-language models (VLMs). We evaluate five separate benchmark VLMs on edit detection and edit-operation classification. By focusing on where and how consumer AI edits occur, rather than only whether an image is synthetic, ConsumerGenEdit provides a practical testbed for multilingual VLM grounding, image provenance, and robust interpretation of AI-edited media.
From Benchmarks to Real-World Use: Evaluating the Robustness of Vision-Language Models for Chart Understanding
Awal Ahmed Fime | Mohammed Saidul Islam | Md Tahmid Rahman Laskar | Md Zarif Hossain | Ridwan Mahbub | Mir Tafseer Nayeem | Mizanur Rahman | Ahmed Imteaj | Enamul Hoque Prince
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing: Industry Track
Awal Ahmed Fime | Mohammed Saidul Islam | Md Tahmid Rahman Laskar | Md Zarif Hossain | Ridwan Mahbub | Mir Tafseer Nayeem | Mizanur Rahman | Ahmed Imteaj | Enamul Hoque Prince
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing: Industry Track
Recent advances in large Vision-Language Models (VLMs) have led to impressive performance on chart understanding tasks. However, existing evaluations are largely limited to clean, canonical charts and do not adequately measure robustness under realistic conditions. To address this gap, we introduce ROBUSTCHART360, a comprehensive benchmark for evaluating chart understanding robustness under realistic real-world variations. ROBUSTCHART360 spans six robustness dimensions covering textual and cross-modal interference, rendering and display degradation, accessibility-oriented transformations, and visual style variation. Using this benchmark, we conduct a large-scale evaluation of 14 proprietary and open-source VLMs across 2,505 chart instances and multiple robustness conditions designed to simulate practical deployment scenarios. Our analysis on 35,070 model responses reveals that current VLMs are highly sensitive to seemingly minor variations such as low-resolution rendering, and mobile layouts, with performance dropping by as much as 33.9% under certain conditions, such as modality gap. We further find that models often over-rely on textual priors when visual and textual signals conflict, indicating weak visual grounding despite strong performance on standard benchmarks. Our findings highlight a substantial gap between benchmark accuracy and real-world robustness, motivating the development of more reliable and visually grounded multimodal systems for chart understanding. We will release our code and dataset at <redacted>.
No Innocence in Styling: Discovery of Privacy Protection Capabilities and Security Risks in Consumer Generative AI Writing Assistants
Mohd. Farhan Israk Soumik | Syed Mhamudul Hasan | Wanniarachchi Kankanamge Malithi Mithsara | Ahmed Imteaj | Abdur R. Shahid
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 6: Industry Track)
Mohd. Farhan Israk Soumik | Syed Mhamudul Hasan | Wanniarachchi Kankanamge Malithi Mithsara | Ahmed Imteaj | Abdur R. Shahid
Proceedings of the 64th Annual Meeting of the Association for Computational Linguistics (Volume 6: Industry Track)
Generative AI writing assistants are now integrated into consumer platforms such as Apple Intelligence and Microsoft Copilot, enabling millions of users to automatically rewrite and stylize their text. While positioned as productivity tools, their deployment at scale introduces important and underexplored implications for privacy and platform safety. This paper examines the dual-use nature of platform-level text stylization. Stylization can enhance privacy by suppressing stylistic signals used for profiling and personal data inference. However, the same transformations can be leveraged to evade automated safeguards, including misinformation detection systems. We conduct empirical case studies on emotion inference and misinformation detection across benchmark datasets using deployed stylization modes. We evaluate downstream impact with fine-tuned open-source models and GPT-4o in a zero-shot setting. Our results show that stylization reduces emotion inference accuracy, lowering profiling risk, while increasing error rates in misinformation detection. This discovery reveal a measurable trade-off among privacy protection, moderation robustness, and stylization, highlighting new design and governance challenges for industry deployment.