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在痕迹摄影中,利用平面反射镜的情况一般可分为两类: 1.拍摄平面反射镜中的反射痕迹; 2.利用平面反射镜反射光照明痕迹。在实践中,利用平面反射镜反射光照明痕迹,一般较易掌握,并能得到较好的效果。但拍摄平面反射镜中的反射痕迹常常会遇到影像不清、变形或有杂乱背景等现象。这主要是由于平面反射镜放置的位置不当、调焦不准及环境光控制不当所造成的。因此在利用平面反射镜拍摄反射痕迹时,必须根据其成像原理进行调焦,才能保证痕迹影像清晰。如图1所示,从照相机所在位置看到的痕
In the trace photography, the use of plane reflectors in general can be divided into two categories: 1. Filming plane reflection mirror reflection; 2. The use of plane reflection mirror reflective light illumination. In practice, the use of flat mirrors reflect light traces, generally easier to grasp, and can get better results. However, the reflections in flat mirrors often encounter unclear images, distorted or cluttered backgrounds. This is mainly due to the improper placement of the plane mirror, the focus is not allowed and the control of ambient light caused by improper. Therefore, when using a flat mirror to capture reflection marks, focusing must be carried out according to the imaging principle so as to ensure that the trace image is clear. As shown in Figure 1, the mark seen from where the camera is located