客观视力智能测试方法的研究

THE STUDIES ON INTELLECTUAL METHOD FOROBJECTIVE MEASUREMENT OF VISUAL ACUITY

笔者以Ohm′s原理〔3〕和Wolin′s测试系统〔4〕为基础,设计研制出一种新型的智能式客观视力测试系统,使客观视力的测试过程全部实现了智能化和自动化。该系统操作方便,试测结果准确可靠,用该系统测得的客观视力与用国际准视力表测得的主观视力之间有很高的相关性(相关系数γ=0.918)。 文中介绍了客观视力智能测试的工作原理及测试方法,详细阐述了一种新的眼动信号处理方法:慢相速度互相关分析法及互相关的简化运算式,简要介绍了测试系统的硬件结构和软件流程。笔者认为互相关分析法比其它信号处理方法更适合于眼动信号的识别分类处理。

<ABSTRACT> Author designed and developed a new intellectual system for objec- tive testing of visual acuity based on Ohm's principle[3] and Wolin's test system[4]. The system enables objective measurement of visual ac- uity intelligentation and automation. Its operation is very sitnple and the result for testing visual acllity is accurate. A high correlation was found between objective acuity measured by the system and subjective acuity measured by international standard acuity chart (r = 0. 913 ). In this paper. the principle and technique of intellectual objective testing of visual acuity was presented, a new method of eye-movement signal processing. slow phase velocity correlation analysis, and simplif- ied correlation calculation were described in details. The hard and soft ware of the system were simply described. The author considered the correlation analysis is more fit for distinguishing eye-movement signai than other signal processing method.