基于混沌扰动机制的天牛须搜索算法及其在图像增强中的应用
Beetle antennae search algorithm based on chaotic disturbance mechanism and its application in image enhancement
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摘要: 针对天牛须搜索算法(BAS)收敛速度慢、精度低、全局搜索效果较差等问题,提出了一种基于混沌扰动机制的改进天牛须搜索算法(CDBAS).该算法通过混沌机制对天牛位置进行扰动,在迭代时先进行全局搜索,找到全局适应度值大的区域,然后在该区域中再进行搜索.对BAS和CDBAS分别用7个测试函数进行实验对比,结果显示CDBAS算法具有更好的优化性能,其收敛速度更快,求解精度更高.将CDBAS算法应用于图像增强中,结果表明,CDBAS算法的增强效果更为明显,图像更加清晰,层次信息更为丰富.Abstract: To solve the problem of slow convergence,low precision and poor global search effect of beetle antennae search algorithm (BAS), an improved beetle antennae search algorithm (CDBAS) based on chaotic disturbance mechanism was proposed.The algorithm disturbed the position of longicorn by chaotic mechanism, searched the region with large global fitness value first in iteration, and then searched in the region.Comparation of BAS and CDBAS with 7 test functions showed that CDBAS algorithm had better optimization performance, faster convergence speed and higher accuracy.The CDBAS algorithm was applied to image enhancement. The results showed that the enhancement effect of CDBAS algorithm was more obvious, the image was clearer and the hierarchical information was more abundant.
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Key words:
- beetle antennae search algorithm /
- chaos disturbance /
- image enhancement /
- gray value
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