scholarly journals Topology Reconstruction of Tree-Like Structure in Images via Structural Similarity Measure and Dominant Set Clustering

2019 ◽  
Author(s):  
Jianyang Xie ◽  
Yitian Zhao ◽  
Yonghuai Liu ◽  
Pan Su ◽  
Yifan Zhao ◽  
...  
Keyword(s):  
Similarity Measure ◽  
Structural Similarity ◽  
Dominant Set ◽  
Structural Similarity Measure

scholarly journals Full-Reference Facial Image Quality Assessment and Identification by Two Proposed Measures

2020 ◽  
Vol 55 (2) ◽  
Author(s):  
Rasha Ali Dihin ◽  
Nisreen Ryadh Hamza ◽  
Zinah Hussein Toman
Keyword(s):  
Image Quality ◽  
Similarity Measure ◽  
Image Quality Assessment ◽  
Mean Squared Error ◽  
Signal To Noise Ratio ◽  
Structural Similarity ◽  
Color Images ◽  
Facial Image ◽  
Histogram Similarity ◽  
Structural Similarity Measure

In this paper, the goal was to identify a person’s face in the acquired image by the proposed measures. We discuss the appearance of two types of noise together in an image. The acquired facial image quality was also assessed by two proposed measures, the histogram similarity measure and the histogram error mean measure. The histogram structural similarity measure is a previously described modified version of the information-theoretic structural similarity measure. It was merged with the structural similarity measure and the error mean measure, derived from the mean squared error, to get the proposed measures. The first proposed histogram similarity measure consists of merging histogram structural similarity with structural similarity measure, and the second proposed histogram error mean measure consists of merging histogram structural similarity with error mean measure. Finally, many algorithms for identification have recently been proposed to measure the similarity between two images. The results showed that the two proposed measures were better than existing methods. Different noises types (such as white Gaussian, speckle, and salt-and-pepper) are used with the proposed methods. Two facial image datasets were used in this paper. The AT&T database included color images of 92 x 112 pixels (px), and the Faculty of Industrial Engineering database included color images of 480 x 640 px. To evaluate performance and quantify the error, the structural similarity measure, histogram structural similarity, and error mean measure were considered. Noise ratios that depended on a peak signal-to-noise ratio were used in this experiment.

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