arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.2727cs.CVcs.MMeess.IV
收藏

基于稀疏表示的图像质量评价

Sparse Representation-based Image Quality Assessment

the University of British Columbia(不列颠哥伦比亚大学)

Tanaya Guha, Ehsan Nezhadarya, Rabab K Ward

摘要:

图像质量评价的一个成功方法是比较失真图像和参考图像之间的结构信息。然而,提取对我们的视觉系统至关重要的结构信息是一项具有挑战性的任务。本文解决了这个问题,采用稀疏表示为基础的方法,并提出了一种新的度量称为\emph{sparse representation-based quality}(SPARQ)\emph{index}。所提出的方法将参考图像的固有结构学习为一组基向量,使得图像中的任何结构都可以由仅少数基向量的线性组合表示。采用这种稀疏策略是因为它是已知的,以产生基本向量,是定性类似于哺乳动物初级视觉皮层中存在的简单细胞的感受野。失真图像的视觉质量的估计通过比较的参考和失真图像的学习的基础向量类似于皮层细胞方面的结构。我们的方法进行了评估,六个公开的主题评级图像质量评估数据集。建议的SPARQ指数始终表现出与所有数据集的主观评级的高度相关性,并表现得更好或与最先进的。

英文摘要:

A successful approach to image quality assessment involves comparing the structural information between a distorted and its reference image. However, extracting structural information that is perceptually important to our visual system is a challenging task. This paper addresses this issue by employing a sparse representation-based approach and proposes a new metric called the \emph{sparse representation-based quality} (SPARQ) \emph{index}. The proposed method learns the inherent structures of the reference image as a set of basis vectors, such that any structure in the image can be represented by a linear combination of only a few of those basis vectors. This sparse strategy is employed because it is known to generate basis vectors that are qualitatively similar to the receptive field of the simple cells present in the mammalian primary visual cortex. The visual quality of the distorted image is estimated by comparing the structures of the reference and the distorted images in terms of the learnt basis vectors resembling cortical cells. Our approach is evaluated on six publicly available subject-rated image quality assessment datasets. The proposed SPARQ index consistently exhibits high correlation with the subjective ratings on all datasets and performs better or at par with the state-of-the-art.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑