自动调焦系统速度评估与仿真
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摘要
为了有效避免自动调焦算法在验证评估过程中需要依赖于调焦硬件机构的问题,研制了一套基于离焦图像模拟的自动调焦性能评估与仿真系统。该系统通过生成不同离焦状态下的图像,实现如下两方面的功能:一方面可以实现不同清晰度评价函数的性能评估;另一方面还可以根据调焦系统的设定参数,对调焦过程调整以及调焦窗口选取进行效果仿真和性能评估。实验结果表明,该系统可以根据设定的光机参数,对自动调焦过程中清晰度评价函数性能、调焦效果、搜索路径、调整耗时等性能进行初步仿真和评估。也可以为调焦系统的光学系统、机械结构以及电机驱动的设计提供一定的参考依据。
In order to get rid of the dependence of auto-focus algorthms on focusing system hardware in the process of verification and simulation,an evaluation and simulation system is developed in the way of image simulation,which is used for evaluating the performance of auto-focusing algorithm.By generating blurred images with different degrees of defocus,this system can realize the following two functions:the performance of different articulation evaluation functions can be evaluated,on the other hand,the adjusted process for auto-focus and area selection for focus window can be simulated and evaluated,according to setting parameters of focusing mechanism.Experimental results indicate that this system can simulate and evaluate the performance,such as,definition evaluation function,autofocus effect,searching path and time consuming of auto-focus process,by setting optical and mechanical parameters.It can also provide some reference for the design of optical system,mechanical structure and motor drive of the focusing system.
In order to get rid of the dependence of auto-focus algorthms on focusing system hardware in the process of verification and simulation,an evaluation and simulation system is developed in the way of image simulation,which is used for evaluating the performance of auto-focusing algorithm.By generating blurred images with different degrees of defocus,this system can realize the following two functions:the performance of different articulation evaluation functions can be evaluated,on the other hand,the adjusted process for auto-focus and area selection for focus window can be simulated and evaluated,according to setting parameters of focusing mechanism.Experimental results indicate that this system can simulate and evaluate the performance,such as,definition evaluation function,autofocus effect,searching path and time consuming of auto-focus process,by setting optical and mechanical parameters.It can also provide some reference for the design of optical system,mechanical structure and motor drive of the focusing system.
引文
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[2]王欣,安志勇,杨瑞宁.基于图像清晰度评价函数的CCD摄像机自动调焦技术研究[J].长春理工大学学报(自然科学版),2008,31(1):11-14.WANG X,AN Z Y,YANG R N.The research of CCD camera auto-focusing technology based on image definition criterion[J].Journal of Changchun University of Science and Technology(Natural Science Edition),2008,31(1):11-14.(in Chinese)
[3]黄艳,徐巧玉,叶东,等.基于微分图像自相关的自动对焦法[J].光学学报,2010,30(12):3435-3440.HUANG Y,XU Q Y,YE D,et al.Auto-focus method based on autocorrelation of derivative image[J].Acta Optica Sinica,2010,30(12):3435-3440.(in Chinese)
[4]王佳松,孙海江,江山,等.一种灰度梯度暗通道图像自动调焦方法[J].液晶与显示,2018,33(8):669-675.WANG J S,SUN H J,JIANG S,et al.Auto-focusing method based on gray gradient and dark channel[J].Chinese Journal of Liquid Crystals and Displays,2018,33(8):669-675.(in Chinese)
[5]马泽龙.高速相机自动快速调光调焦方法研究[D].长春:中国科学院长春光学精密机械与物理研究所,2017.MA Z L.Fast and automatic exposure and focus control method research for high-speed camera[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2017.(in Chinese)
[6]苑嘉辉,蔡洪波,刘奇,等.广角望远镜实时自动调焦的清晰度评价方法[J].光学精密工程,2017,25(5):1368-1377.YUAN J H,CAI H B,LIU Q,et al.Definition evaluation method for real-time auto-focusing of wide-angle telescope[J].Optics and Precision Engineering,2017,25(5):1368-1377.(in Chinese)
[7]王冠军.基于图像处理的光电测量设备自动调焦方法研究[D].长春:长春光学精密机械与物理研究所,2016.WANG G J.Research on auto-focusing method of photoelectric measurement equipment based on image processing[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2016.(in Chinese)
[8]路朋罗.基于图像处理技术的自动调焦方法研究[D].长春:长春光学精密机械与物理研究所,2016.LU P L.Study on auto-focusing methods based on image processing technology[D].Changchun:Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,2016.(in Chinese)
[9]宋言明,潘志康,孟晓辰,等.基于仿人眼自适应调节的多光谱视觉图像处理方法[J].红外与激光工程,2017,46(9):0910001.SONG Y M,PAN Z K,MENG X C,et al.Multispectral visual image processing method based on adaptive regulation of humanoid eye[J].Infrared and Laser Engineering,2017,46(9):0910001.(in Chinese)
[10]王昊,张涛,张振,等.单幅图像估计离焦量的航空摄像机自动调焦系统[J].液晶与显示,2016,31(5):484-490.WAHG H,ZHANG T,ZHANG Z,et al.System of aerial camera auto-focus based on defocus estimate by single image[J].Chinese Journal of Liquid Crystals and Displays,2016,31(5):484-490.(in Chinese)