【摘要】 为实现婴幼儿眼底疾病的及时诊断与治疗,开发的婴幼儿视网膜广域成像系统可以解决成像时大视场要求.系统包括照明部分、成像部分和图像采集装置.设计了角膜接触眼底镜,采用像差小、折射率大的非球面设计,满足大视场的要求;设计了图像采集装置,使用C++编写图像采集处理软件,进行图像采集、相机标定和几何畸变校正.实验结果表明:采用多环光纤光线照明的婴幼儿视网膜广域成像系统可以实现85°视场的较清晰广域成像;采用基于相机标定的图像几何畸变校正方法,可有效补偿视网膜成像光路的畸变.该婴幼儿视网膜广域成像系统可以为眼科疾病的诊断、筛查提供客观、清晰的依据.更多还原

【Abstract】 In order to realize the timely diagnosis and treatment of infantile fundus diseases, the developed infant retinal wide-area imaging system can solve the large field of view requirements during imaging. The system includes an illumination portion, an imaging portion, and an image capture device.Designed corneal contact ophthalmoscope, using aspherical design with small aberration and large refractive index to meet the requirements of large field of view. The image acquisition device is designed which is written in C++ for image acquisition, camera calibration, and geometric distortion correction. The experimental results show that the wide-area retinal imaging system for infant can achieve wide-area imaging of 85° field of view; multi-ring fiber optic illumination can obtain clear retinal images; the correction based on camera calibration of image geometric distortion can effectively compensate geometric distortion of the retinal imaging light path. The wide-area retinal imaging system for infant can provide an objective and clear basis for the diagnosis and screening of ophthalmic diseases.更多还原