中文摘要：

针对现有的相似材料模型实验位移观测方法的局限性，采用普通数码照相方法进行模型测点的位移观测。在每个测点周围布设独立的控制格网并进行单点数码照相，在常规数字成图软件中对数码照片进行图像处理，获取控制格网角点和测点标志的图像坐标，通过坐标变换和影像畸变纠正后，解算出各测点在独立控制格网中的实际坐标。实例应用表明，该方法简便实用，测定位移精度高且可靠，可在模型实验中推广应用。

英文摘要：

In view of the limitations of the current displacement measurement method, the ordinary digital photography is applied to similar material model test. In the model test, independent control net is set up around every measurement point , and image co-ordinates of these digital photos,taken from single measurement point are obtained on current image processing system ,then actual co-ordinates of measurement point in independent control net are calculated according to co-ordinate conversion and distortion rectification model of image. An example indicates that the digital photography, with high and reliable measurement accuracy, is a new practical method of displacement measurement and can be applied to similar material model test.