What is it about?
The quality of image products in second-hand marketplaces is a critical factor as it can significantly impact a buyer's decision-making process as well as overall user trust. Inspired by the successful application of LLM capabilities as text-based task evaluators, we propose an approach that leverages multi-modal large language models (MLLMs) as evaluators of image quality. In this work, we conduct a systematic comparison of several state-of-the-art MLLMs, evaluating the alignment between the scores generated by these models and the human scores collected from a survey of 929 users in a second-hand marketplace. Our findings demonstrate that some of the evaluated MLLMs can achieve a high level of agreement with human judgments. To further understand the differences between LLM-based and human scores, we also present an analysis of the alignment between explanations generated by LLMs and those provided by humans. Overall, we believe our findings underscore the potential of LLMs for automatic image quality assessment.
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Why is it important?
In a second-hand marketplace, sellers are private sellers, but buyers have high expectations about the item itself and the ads. The quality of image has a direct impact on the sales effectiveness and brand perception, and all the more on GenZ.
Perspectives
This article is an illustration of an incredible collaboration between Data scientists and UX designers/researchers, within the Adevinta group : a european company including several 2nd hand marketlpaces as leboncoin, Kleinanzeigen, Mobile, Milanuncios, Willhaben… Project staff : Sandra Garcia-Esparza, Victor Codina, Salma Lahbiss, Nafi Cissé, Imène Sediri
Imène Sediri
Read the Original
This page is a summary of: Towards Improving Image Quality in Second-Hand Marketplaces with LLMs, July 2025, ACM (Association for Computing Machinery),
DOI: 10.1145/3726302.3731960.
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