Large dynamic range Shack–Hartmann wavefront measurement based on image segmentation and a neighbouring-region search algorithm

2019 ◽  
Vol 450 ◽  
pp. 190-201
Author(s):  
Zeyu Gao ◽  
Xinyang Li ◽  
Hongwei Ye
Keyword(s):  
Image Segmentation ◽  
Dynamic Range ◽  
Search Algorithm ◽  
Large Dynamic Range ◽  
Wavefront Measurement ◽  
Neighbouring Region ◽  
Region Search

An Image Segmentation Method Based on Two-Dimensional Entropy and Chaotic Lightning Attachment Procedure Optimization Algorithm

2020 ◽  
Vol 34 (11) ◽  
pp. 2054030 ◽  
Author(s):  
Wei Liu ◽  
Shuai Yang ◽  
Zhiwei Ye ◽  
Qian Huang ◽  
Yongkun Huang
Keyword(s):  
Image Segmentation ◽  
Maximum Entropy ◽  
Optimization Algorithm ◽  
Search Algorithm ◽  
Computational Time ◽  
Two Dimensional ◽  
Threshold Segmentation ◽  
Grasshopper Optimization Algorithm ◽  
Grasshopper Optimization ◽  
Competitive Algorithms

Threshold segmentation has been widely used in recent years due to its simplicity and efficiency. The method of segmenting images by the two-dimensional maximum entropy is a species of the useful technique of threshold segmentation. However, the efficiency and stability of this technique are still not ideal and the traditional search algorithm cannot meet the needs of engineering problems. To mitigate the above problem, swarm intelligent optimization algorithms have been employed in this field for searching the optimal threshold vector. An effective technique of lightning attachment procedure optimization (LAPO) algorithm based on a two-dimensional maximum entropy criterion is offered in this paper, and besides, a chaotic strategy is embedded into LAPO to develop a new algorithm named CLAPO. In order to confirm the benefits of the method proposed in this paper, the other seven kinds of competitive algorithms, such as Ant–lion Optimizer (ALO) and Grasshopper Optimization Algorithm (GOA), are compared. Experiments are conducted on four different kinds of images and the simulation results are presented in several indexes (such as computational time, maximum fitness, average fitness, variance of fitness and other indexes) at different threshold levels for each test image. By scrutinizing the results of the experiment, the superiority of the introduced method is demonstrated, which can meet the needs of image segmentation excellently.

scholarly journals Optofluidic laser for dual-mode sensitive biomolecular detection with a large dynamic range

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Xiang Wu ◽  
Maung Kyaw Khaing Oo ◽  
Karthik Reddy ◽  
Qiushu Chen ◽  
Yuze Sun ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Large Dynamic Range ◽  
Dual Mode ◽  
Biomolecular Detection
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