A Normalized Absolute Values Adaptive Evaluation Function of Image Clarity
<p>Flowchart of NAVA function to calculate image clarity.</p> "> Figure 2
<p>Background brightness monitoring. (<b>a</b>) Background brightness monitoring scheme; (<b>b</b>) Example of background brightness monitoring area.</p> "> Figure 3
<p>Test platform.</p> "> Figure 4
<p>Gear images with different background brightness (numbers in the images are background gray values). (<b>a</b>) Images of virtual master gear; (<b>b</b>) Images of actual gears.</p> "> Figure 5
<p>Effects of background brightness variation on the result of clarity functions. (<b>a</b>) Experiment with virtual gear images; (<b>b</b>) Experiment with actual gear images.</p> "> Figure 6
<p>Time taken for calculating image clarity results using the clarity evaluation function.</p> "> Figure 7
<p>Images of gears with different contour lengths (numbers in the images are contour length in pixels). (<b>a</b>) Images of virtual master gears; (<b>b</b>) Images of actual gears.</p> "> Figure 8
<p>Effects of contour length variation on clarity function values. (<b>a</b>) Experiment of virtual gear images; (<b>b</b>) Experiment of actual gear images.</p> "> Figure 9
<p>Clarity evaluation experiment of placing two objects simultaneously. (<b>a</b>) Images of actual gears captured at different distances; (<b>b</b>) The curve of clarity evaluation values changing with object distance.</p> ">
Abstract
:1. Introduction
2. Principle of the Clarity Evaluation Function
2.1. Classical Clarity Evaluation Functions
2.2. NAVA Function
3. Testing and Analysis
3.1. Experiment on Changing Background Brightness
3.2. Experiment on Changing the Contour Length of the Measured Object
3.3. Experiment on Two Objects with Different Object Distances
4. Conclusions and Future Work
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Wang, X.; Yao, T.; Liu, M.; Zheng, K.; Zhao, C.; Xiao, L.; Zhu, D. A Normalized Absolute Values Adaptive Evaluation Function of Image Clarity. Sensors 2023, 23, 9017. https://doi.org/10.3390/s23229017
Wang X, Yao T, Liu M, Zheng K, Zhao C, Xiao L, Zhu D. A Normalized Absolute Values Adaptive Evaluation Function of Image Clarity. Sensors. 2023; 23(22):9017. https://doi.org/10.3390/s23229017
Chicago/Turabian StyleWang, Xiaoyi, Tianyang Yao, Mingkang Liu, Kunlei Zheng, Chengxiang Zhao, Longyuan Xiao, and Dongjie Zhu. 2023. "A Normalized Absolute Values Adaptive Evaluation Function of Image Clarity" Sensors 23, no. 22: 9017. https://doi.org/10.3390/s23229017