阴影照片 meaning in Chinese

direct-shadow picturepiston
shadowgraph

In order to study the combustion process and the movement of propellant in the barrel , a multi - photo x - ray experiment system was designed . four groups of photos under different ignition systems were obtained , and these photos were manipulated with digital image manipulation technology . the gray degree of the photos was averaged , and the information , such as density , velocity of the projectile and the trace - indicating grains and confliction velocity of the propellant against the projectile under the consideration of the velocity of the projectile , was extracted and analyzed quantitatively
本文就利用由多幅脉冲x光摄影技术所获得的四种不同点火条件下的火炮膛内火药颗粒群运动状况的阴影照片，进一步利用数字图像处理的技术及相关算法，编制软件对照片进行了处理，统一了照片的灰度，最终在定量上获得了不同点火条件下的火药颗粒的密度分布规律、弹丸和示踪药粒的运动速度以及在考虑到弹丸运动的前提下的火药颗粒与弹丸的撞击速度。