Evaluation and simulation of auto-focus system speed

Chang-chun LI; Guo-min CHENG; Yong-gang CAO

doi:10.3788/YJYXS20193405.0515

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Evaluation and simulation of auto-focus system speed

Image Processing | 更新时间：2020-07-05

- Evaluation and simulation of auto-focus system speed
- Chinese Journal of Liquid Crystals and Displays Vol. 34, Issue 5, Pages: 515-520(2019)
- 作者机构：
  
  1.91245部队, 辽宁葫芦岛 125001
  2.中国科学院长春光学精密机械与物理研究所, 吉林长春 130033
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20193405.0515
  CLC： TP391.41
- Received：21 December 2018，
  
  Accepted：16 January 2019，
  
  Published：05 May 2019
- 稿件说明：
移动端阅览
Chang-chun LI, Guo-min CHENG, Yong-gang CAO. Evaluation and simulation of auto-focus system speed[J]. Chinese journal of liquid crystals and displays, 2019, 34(5): 515-520.
DOI：

Chang-chun LI, Guo-min CHENG, Yong-gang CAO. Evaluation and simulation of auto-focus system speed[J]. Chinese journal of liquid crystals and displays, 2019, 34(5): 515-520. DOI： 10.3788/YJYXS20193405.0515.

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。

Abstract

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

auto-focus 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.

关键词

Keywords

references

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