Opto-Electronic Engineering
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Vol. 46, No. 6, 2019
Cover Story:Cui G M, Zhang K Q, Mao L, et al. Micro-image definition evaluation using multi-scale decomposition and gradient absolute value[J]. Opto-Electronic Engineering, 2019, 46(6): 180531

Because the depth of field of the microscope imaging system is very small, clear images can only be acquired within a small range of depth variations. The evaluation and determination of microscopic image sharpness directly affect the precision of microscope autofocus and become an important index to measure the imaging quality of microscopic system.
The research team of Cui Guangmang, Ningbo Yongxin Optics Co., Ltd. and School of Electronics and Information, Hangzhou Dianzi University, proposed a micro-image sharpness evaluation algorithm by combining the design of multi-scale decomposition tool and gradient absolute value operator, aiming at the quality evaluation of micro-image autofocus and imaging system. Non-subsampled shearlet transform (NSST) was used to decompose image edge information into detail layers of different scales. Through the setting of anti-noise threshold, gradient absolute value energy operators of high frequency and low frequency were calculated. By taking advantage of the changing characteristics of high and low frequency energy information, effective microscopic definition evaluation was realized.
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Online Time:Jun 01, 2019
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Min Lei, Yang Ping, Xu Bing, et al. Multi-image blind super-resolution in variational Bayesian framework[J]. Opto-Electronic Engineering, 2019, 46(6): 180149. 
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Online Time:Jun 01, 2019
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Online Time:Jun 01, 2019
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Wang Ronggui, Yao Xuchen, Yang Juan, et al. Deep transfer learning for fine-grained categorization on micro datasets[J]. Opto-Electronic Engineering, 2019, 46(6): 180416. 
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Online Time:Jun 01, 2019
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Peng Bo, Luo Shasha, Yang Feng, et al. Performance analysis of a sum-table-based method for computing cross-correlation in GPU-accelerated ultrasound strain elastography[J]. Opto-Electronic Engineering, 2019, 46(6): 180437. 
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Online Time:Jun 01, 2019
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Wen Jia, Liu Mingwei, Cui Jun, et al. Sparse reconstruction of interferometric hyperspectral image based on adaptive threshold[J]. Opto-Electronic Engineering, 2019, 46(6): 180443. 
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Online Time:Jun 01, 2019
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Dang Xiangyu. Preparation and properties of solar-blind photomultiplier tube[J]. Opto-Electronic Engineering, 2019, 46(6): 180460. 
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Online Time:Jun 01, 2019
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Cui Guangmang, Zhang Keqi, Mao Lei, et al. Micro-image definition evaluation using multi-scale decomposition and gradient absolute value[J]. Opto-Electronic Engineering, 2019, 46(6): 180531. 
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Online Time:Jun 01, 2019
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Online Time:Jul 03, 2019
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Hou Zhiqiang, Zhao Mengqi, Yu Wangsheng, et al. Color image segmentation based on SLIC and watershed algorithm[J]. Opto-Electronic Engineering, 2019, 46(6): 180589. 
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Qian Mingyong, Lin Shanling, Zeng Suyun, et al. Real-time dynamic driving system implementation of electrowetting display[J]. Opto-Electronic Engineering, 2019, 46(6): 180623.