摘要
对眼球中心瞳孔清晰对焦是验光仪等现代眼科医疗仪器正常工作的重要前提,提出一种基于图像处理的眼球自动对焦法。该方法是对传统的登山随动聚焦法的改进,巧妙利用光斑,引入图像清晰度评价参数H,在搜索过程中先大步距缩小物距,然后计算出H后进行小步距精确对焦。实验表明:本方法对焦系统具备良好的准确性、实时性、抗干扰性和较强的鲁棒性,达到了理想的对焦效果。
Clear focus on the central pupil of the eye is an important premise to the computer Optometry and other modern department of ophthalmology medical instrument to work normally. An autofocus of the eyeall method was presented based on image processing, which used of spot cleverly, introducing image clarity evaluation parameters of H, in the search process in the first big step to narrow the distance, and then calculated the H by small step precise focusing. The experimental results illustrate that this method focusing system has good accuracy, real--time, anti--jamming and strong robustness, reached the focusing effect of the ideal.
出处
《中国科技信息》
2013年第7期46-47,共2页
China Science and Technology Information
基金
中北大学第九届研究生科技基金(20120937)
