Plug In, Grade Right: Psychology-Inspired AGIQA

• URL: http://arxiv.org/abs/2512.22780v1
• Date: Sun, 28 Dec 2025 04:51:05 GMT
• Title: Plug In, Grade Right: Psychology-Inspired AGIQA
• Authors: Zhicheng Liao, Baoliang Chen, Hanwei Zhu, Lingyu Zhu, Shiqi Wang, Weisi Lin,
• Abstract summary: Existing AGIQA models estimate image quality by measuring and aggregating similarities between image embeddings and text embeddings.<n>We propose an improved Graded Response Model (GRM) for AGIQA.<n>Our Arithmetic GRM based Quality Grading (AGQG) module enjoys a plug-and-play advantage.
• Score: 60.23968344837525
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Existing AGIQA models typically estimate image quality by measuring and aggregating the similarities between image embeddings and text embeddings derived from multi-grade quality descriptions. Although effective, we observe that such similarity distributions across grades usually exhibit multimodal patterns. For instance, an image embedding may show high similarity to both "excellent" and "poor" grade descriptions while deviating from the "good" one. We refer to this phenomenon as "semantic drift", where semantic inconsistencies between text embeddings and their intended descriptions undermine the reliability of text-image shared-space learning. To mitigate this issue, we draw inspiration from psychometrics and propose an improved Graded Response Model (GRM) for AGIQA. The GRM is a classical assessment model that categorizes a subject's ability across grades using test items with various difficulty levels. This paradigm aligns remarkably well with human quality rating, where image quality can be interpreted as an image's ability to meet various quality grades. Building on this philosophy, we design a two-branch quality grading module: one branch estimates image ability while the other constructs multiple difficulty levels. To ensure monotonicity in difficulty levels, we further model difficulty generation in an arithmetic manner, which inherently enforces a unimodal and interpretable quality distribution. Our Arithmetic GRM based Quality Grading (AGQG) module enjoys a plug-and-play advantage, consistently improving performance when integrated into various state-of-the-art AGIQA frameworks. Moreover, it also generalizes effectively to both natural and screen content image quality assessment, revealing its potential as a key component in future IQA models.

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