arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.03124cs.CV
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一种基于细节的线性全参考图像质量预测方法

A Detail Based Method for Linear Full Reference Image Quality Prediction

Elio D. Di Claudio, Giovanni Jacovitti

摘要:

在本文中,提出了一种新的全参考方法的图像质量评估,使用两个单独的指标的组合来衡量细节损失和虚假细节的感知不同的影响。为此,受损图像的梯度被局部分解为原始梯度的预测版本加上梯度残差。假设细节衰减识别细节损失,而梯度残差描述虚假细节。事实证明,细节损失的感知影响与位置Fisher信息的损失大致呈线性关系,而伪细节的感知影响与信号与残差比的对数度量大致成比例。这两个指标的仿射组合形成了一个新的指数强烈相关的经验微分平均意见得分(DMOS)的一类重要的图像损伤,验证了三个独立的流行数据库。该方法允许通过仿射变换将来自这些不同数据库的DMOS数据对齐和合并到共同的DMOS尺度。出乎意料的是,通过分析受加性噪声影响的单个图像,DMOS比例设置是可能的。

英文摘要:

In this paper, a novel Full Reference method is proposed for image quality assessment, using the combination of two separate metrics to measure the perceptually distinct impact of detail losses and of spurious details. To this purpose, the gradient of the impaired image is locally decomposed as a predicted version of the original gradient, plus a gradient residual. It is assumed that the detail attenuation identifies the detail loss, whereas the gradient residuals describe the spurious details. It turns out that the perceptual impact of detail losses is roughly linear with the loss of the positional Fisher information, while the perceptual impact of the spurious details is roughly proportional to a logarithmic measure of the signal to residual ratio. The affine combination of these two metrics forms a new index strongly correlated with the empirical Differential Mean Opinion Score (DMOS) for a significant class of image impairments, as verified for three independent popular databases. The method allowed alignment and merging of DMOS data coming from these different databases to a common DMOS scale by affine transformations. Unexpectedly, the DMOS scale setting is possible by the analysis of a single image affected by additive noise.

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。

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