基于贝叶斯推理和自适应转移矩阵的无人工标签图像质量评价

    Human-label-free Image Quality Assessment via Bayesian Inference and Adaptive Transition Matrix

    • 摘要: 盲图像质量评估(Blind Image Quality Assessment, BIQA)模型严重依赖于昂贵的人工主观评分。为了减少这种依赖,使用全参考图像质量评估(Full-Reference IQA, FR-IQA)指标作为代理来生成伪标签。然而,基于 FR-IQA 的方法会引入大量标签噪声,影响评估准确性。本文提出了自适应转移矩阵学习的 BIQA 方法(Adaptive Transition Matrix Learning-based BIQA, ATML-BIQA),该方法从合成失真图像和多个标注器学习,无需人工标签。该方法分为4个阶段:首先,从高质量参考图像合成失真图像并随机配对。其次,8个 FR-IQA 模型为每对图像分配伪二元标签,指示相对感知质量。再次,基于卷积神经网络的 BIQA 模型在这些二元标签上训练,生成贝叶斯最优标签。最后,设计自适应实例转移矩阵(Adaptive Instance Transition Matrix, AITM)来建模伪标签与最优标签之间的关系,捕捉噪声标注与隐含质量值之间的相关性,从而有效进行标签噪声校正,并用校正后的标签重新训练 BIQA 模型以生成最终的质量评分。本研究不仅显著降低了盲图像质量评估对昂贵人工标注的依赖,还通过自适应建模标注噪声,克服了传统代理标签准确性不足的问题。实验证明,该方法在提升模型泛化能力的同时,为无监督或弱监督环境下的质量评估任务提供了一种高效且稳健的新范式。

       

      Abstract: Blind image quality assessment (BIQA) models heavily depend on expensive human subjective ratings. To reduce this dependency, full-reference IQA (FR-IQA) metrics are used as surrogates for generating pseudo-labels. However, FR-IQA-based methods introduce substantial label noise that degrades assessment accuracy. In this research, an Adaptive Transition Matrix Learning-based BIQA (ATML-BIQA) method is proposed that learns from synthetically degraded images and multiple annotators without requiring human labels or suffering from noisy label effects. The method operates in four stages: First, distorted images are synthesized from high-quality references and paired randomly. Ten FR-IQA models then assign pseudo-binary labels indicating relative perceptual quality. Second, a CNN-based BIQA model is trained on these binary labels to generate Bayesian optimal labels. Third, an Adaptive Instance Transition Matrix (AITM) is designed to model the relationship between noisy pseudo-labels and optimal labels, capturing the correlation between noisy annotations and latent ground truth for effective label noise correction. Finally, the BIQA model is retrained with corrected labels to produce final quality scores. This research significantly reduces the reliance of BIQA on expensive manual annotations and overcomes the accuracy limitations of traditional proxy labels by adaptively modeling annotation noise. Experimental results demonstrate that while enhancing model generalization, this method provides an efficient and robust new paradigm for quality assessment tasks in unsupervised or weakly supervised environments.

       

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