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Mitigating Multimodal Hallucination in Large Language Models through Self-Feedback Guided Revision

Core Concepts
VOLCANO, a multimodal self-feedback guided revision model, effectively reduces multimodal hallucination and achieves state-of-the-art performance on multimodal hallucination benchmarks.
The content discusses VOLCANO, a novel approach that utilizes self-feedback as visual cues to mitigate multimodal hallucination in large multimodal models (LMMs). Multimodal hallucination is an issue where LMMs provide incorrect responses that are misaligned with the given visual information. The key highlights are: VOLCANO employs a sequential critique-revision-decide process to iteratively refine its initial response. It first generates an initial response, then provides natural language feedback on the response, and finally revises the response based on the feedback. VOLCANO achieves state-of-the-art performance on multimodal hallucination benchmarks like MMHal-Bench, POPE, and GAVIE. It also outperforms previous models on general multimodal understanding benchmarks like MM-Vet and MMBench. Qualitative analysis shows that VOLCANO's feedback is well-grounded on the image, conveying rich visual details. This suggests that feedback can provide guidance to reduce multimodal hallucination, even when the vision encoder fails to properly ground the image. VOLCANO is publicly released in 7B and 13B model sizes, along with the training data and code.
Large multimodal models (LMMs) suffer from multimodal hallucination, where they provide incorrect responses misaligned with the given visual information. Recent work conjectures that one of the reasons behind multimodal hallucination might be due to the vision encoder failing to ground on the image properly.
"To mitigate this issue, we propose a novel approach that leverages self-feedback as visual cues." "VOLCANO effectively reduces multimodal hallucination and achieves state-of-the-art on MMHal-Bench, POPE, and GAVIE." "Through a qualitative analysis, we show that VOLCANO's feedback is properly grounded on the image than the initial response. This indicates that VOLCANO can provide itself with richer visual information, helping alleviate multimodal hallucination."

Key Insights Distilled From

by Seongyun Lee... at 04-02-2024

Deeper Inquiries

How can the self-feedback generation process in VOLCANO be further improved to provide even more accurate and comprehensive visual information?

In order to enhance the self-feedback generation process in VOLCANO for improved accuracy and comprehensiveness of visual information, several strategies can be considered: Fine-tuning the Vision Encoder: Fine-tuning the vision encoder to better capture and represent visual features can lead to more accurate feedback generation. This can involve training the model on a diverse set of images to improve its understanding of different visual contexts. Attention Mechanism Refinement: Refining the attention mechanism within the model can help focus on relevant image regions more effectively. By adjusting the attention weights during feedback generation, the model can better capture important visual details. Multi-Modal Fusion Techniques: Exploring advanced multi-modal fusion techniques can help integrate visual and textual information more effectively. Techniques like cross-modal attention mechanisms or graph-based fusion can enhance the model's ability to generate accurate feedback. Data Augmentation: Increasing the diversity and quantity of training data can expose the model to a wider range of visual scenarios, leading to more robust feedback generation. Augmenting the training data with variations in image attributes can improve the model's ability to provide accurate feedback. Iterative Training: Implementing iterative training strategies where the model learns from its mistakes and refines its feedback generation over multiple iterations can lead to continuous improvement in accuracy and comprehensiveness.

How might the insights from VOLCANO's approach be applied to improve multimodal understanding and reasoning in other domains beyond visual question answering?

The insights from VOLCANO's approach can be extrapolated to enhance multimodal understanding and reasoning in various domains beyond visual question answering: Natural Language Processing: In text-based tasks, similar self-feedback mechanisms can be employed to refine language generation models. By providing feedback loops that guide the model to produce more accurate and contextually relevant responses, the overall performance of language models can be improved. Audio-Visual Processing: For tasks involving audio-visual data, integrating feedback mechanisms that consider both auditory and visual cues can enhance the model's ability to understand and generate responses based on multi-modal inputs. Medical Imaging: In the field of medical imaging, leveraging self-feedback to refine diagnostic models can lead to more accurate and reliable predictions. By incorporating feedback loops that consider both visual features from medical images and textual information from patient records, the model can improve its diagnostic capabilities. Autonomous Systems: Applying self-feedback mechanisms in autonomous systems can help improve decision-making processes. By integrating feedback loops that consider both sensor data and contextual information, autonomous systems can make more informed and accurate decisions in real-time scenarios. Robotics: In robotics applications, utilizing self-feedback to refine multi-modal sensor fusion can enhance the robot's perception and interaction capabilities. By incorporating feedback loops that consider visual, auditory, and tactile inputs, robots can improve their understanding of the environment and perform tasks more effectively.