检影法

Instantaneous difference is a common approach to detecting objects in the field of computer vision.

目前主要用于室内目标检测的瞬时差分法存在着"虚影"噪声和目标漏检的问题。

Objective To compare the reflective error by retinoscopy with that by autoretractian in cycloplegic children's eyes.

视网膜检影法是一种利用检影镜来检查被检眼静态屈光的客观检查方法。它简单、常用。

After 6 weeks of treatment, the effects of flashing light on eye myopia and axial development were assessed by cycloplegic retinoscopy, A-scan ultrasonography.

分别在暴露前、暴露后6周用散瞳检影验光法测量屈光度，用A超测量眼轴长度。

The sensitivity of dynamic retinoscopy and mydriasis retinoscopy was 97.2% and 95.0%, and the positive predictive value was 70.3% and 68.2%,respectively.

在无散瞳验光条件下，学生群体近视筛查可以考虑小瞳检影法和插片验光法相结合的方法。

Methods In the situation of eyelash shape-muscle was paralysised, the 3~8 years old children with atropine and the 9~14 years with atropine compound,use static retinoscopy and static autorefractor.

3～8岁儿童用阿托品眼膏，9～14岁儿童用复方托品酰胺行睫状肌麻痹后，分别采用检影验光法作静态验光，自动验光仪法作静态验光。

But it suffers from the following two shortcomings:(1) the object detected by instantaneous difference is inherently interfered by "virtual shadow" noise;(2) the interior detection of an object might be partly lost whenever the grey scale is quite uniform.

文章提出基于两次差分之间相关性的"复合差分法"，实现了对"虚影"的消除，并提出一种判定最优差分间隔的策略，减少了目标漏检，使目标检测的完整性得到了显著提高。

Methods Ninety-five subjects (50 myopes, 20 emmetropes, 25 hyperopes) aged 6~15 years, participated. The accommodative lag and amplitude of accommodation were assessed with their refractive errors corrected. The accommodative lags were assessed using MEM dynamic retinoscopy at 40 cm reading distance.

应用动态检影法和移近法分别测量50例发病1~2年的学龄期儿童和青少年近视患儿调节滞后和调节幅度；同样方法测量20例正视眼儿童和25例远视屈光不正患儿；检测其主导眼和非主导眼。

N91 which calibrated through shadow cone method is used for environmental survey in the vicinity of treatment room.

N91，该侦检器经影锥法校正，作为治疗室周围环境中子量测工具。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。