In these years , image measuring has been used in every walk of life gradually . this paper discusses the characteristic , the virtue and the application of digital image measuring . in this paper . after analyzing the practical situation and theory , it has confirmed the project that identify automatically the pointer and the reticle of the pressure gauge with technique of optic photographic system , image process and automatic identification 近年来，图像测量逐渐应用到各行各业。本文讨论了数字图像测量的特点、优点及应用范围，结合实际情况和理论分析，确定了利用光学摄像系统和图像处理、识别技术，自动识别压力表的指针和刻线的方案，解决了压力表示值的自动检定问题，研制了一套集计算机、图像处理和识别、自动控制和光学等技术于一体的压力表示值的自动检定系统。
Then the optical path difference can be obtained with psi algorithm and to use the phase value for each pixel to determine a height value for each pixel . a primary advantage of psi is its high precision . with careful control of environmental conditions , measurement precision to the nanometer scale or below is possible with psi 它的基本测量原理是，通过摄像系统( ccd )接受到的干涉图中空间坐标已知的各个像素点的光强信号，在压电晶体驱动参考光程有序变化时，采集到多幅干涉图的光强信号，由移相干涉法，由光强值得到被测光程差值(位相值) 。
Lack of advanced experimental instrument for studying the object movement in farm machine operations is a serious problem at present . hence a high - speed photography system is established on soil bin to study the rules of moving objects . it is first time to research the moving track of the maize straw shattered on the planter by using a high - speed photography system in order to resolve the anti - blocking problem of no - tillage planter 本文针对农机作业中物体运动试验研究手段落后的现状，在土槽上建立了一套高速摄像系统用于研究物体的运动规律；并针对免耕播种机的堵塞问题，首次将土槽高速摄像系统用于免耕播种机粉碎后秸秆的运动轨迹研究。
Second , it presents the project design of an astronauts ’ kinetic measurement system that can precisely measure the forces and moments of key points on motorial person . it presents a principle and flow of the project design of an astronauts ’ kinetic measurement system . and it particularly discusses the demarcate of camera system , the gathering and storage of experiment pictures , pick - up of the symbol data , the parameter calculating method of target movement , and the general design of assistant equipment 然后给出航天员作用力测量实验系统的设计方案,该系统能够克服重力影响,较精确地得出运动时人体各关键点产生的力和力矩;给出了航天员运动参数测量实验系统的原理及流程,并详细论述了摄像系统标定,实验图像的采集与存储,标志点数据的提取及目标运动参数解算的方法;给出了辅助设备的概要设计。
Abstract : thermochromic liquid crystal infrared imaging system includes a thermochromic liquid crystal infrared sensor , a chopper , controller , a light source , lens , liquid crystal phase plate , optical system , a charge coupled device ( ccd ) array , and microprocessor . the operation and performance of the thermochromic liquid crystal infrared imaging system are described 文摘:红外摄像系统包括热色液晶红外传感器、斩波器、控制器、光源、透镜、液晶相位推移器、微处理器、光学系统、 ccd阵列等，描述了热色液晶红外摄像系统的工作原理和特性。
