应用微机图像技术实现眼科HESS屏检查自动测量

Automation of HESS Screen test for ophthalmologyby using correction algorithem ofgeometry distortion of space image

ＨＥＳＳ屏试验用来测试人眼的斜视程度，是视觉评估重要手段之一。本文介绍的新装置是用摄像头摄取光斑位置输入微机，用空问图像几何畸变核工算法精确地打印出测量结果。摄像头与ＨＥＳＳ屏相对位置及摄像角度任意变化都不影响精确复原被测结果。ＨＥＳＳ屏上还设置了数个控制信号灯，用以实现ＨＥＳＳ屏与微机间的无线联络。此外，投影光斑电筒改用激光电筒，消除了原来用透镜聚光只能限于一固定距离上的缺点。

The HESS-screen test was for check up of eye's strabismus or well-eye. This paper described a new method which used TV camera to take images oflight trace issued by patient, and then used correction algorithm. of geometric distortion of space image, finally printed the result of HESS test chart. All of the control including grabbing images was performed by a special signal lamp and linkedwith the computer wirelessly.