A Perceptual Image Sharpness Metric Based on Local Edge Gradient Analysis

作者：Feichtenhofer Christoph^*; Fassold Hannes; Schallauer Peter

来源：IEEE Signal Processing Letters, 2013, 20(4): 379-382.

DOI：10.1109/LSP.2013.2248711

• Image blur
• image quality assessment
• image sharpness
• no-reference
• perceptual
• sharpness metric

In this letter, a no-reference perceptual sharpness metric based on a statistical analysis of local edge gradients is presented. The method takes properties of the human visual system into account. Based on perceptual properties, a relationship between the extracted statistical features and the metric score is established to form a Perceptual Sharpness Index (PSI). A comparison with state-of-the-art metrics shows that the proposed method correlates highly with human perception and exhibits low computational complexity. In contrast to existing metrics, the PSI performs well for a wide range of blurriness and shows a high degree of invariance for different image contents.

• 出版日期2013-4