由单幅图像重构三轴试样三维变形

针对岩土三轴试验的土样变形测量需要进行三维测量这个难题,提出了新的由单幅图像进行三维重构方法--结构标记法,即利用三维试样标记的各点相对于摄像机的物距不同而造成成像位置改变的原理,从二维图像中提取出了三维信息,实现了三维重构.利用双目或多目图像进行三维重构是比较常见的方法.但是这种方法受到光照条件、噪声干扰、景物几何形状和畸变、表面物理特性以及摄像机特性等因素的严重干扰,而且所需的试验设备也非常复杂.为了克服这些困难,可以采用单幅图像来代替多目图像进行三维重构.给出了计算结果,并说明了这些结果的合理性.

Three-Dimensional Reconstruction of Soil Triaxial Specimen Deformation Based on Single Image

Aiming at problems of the three-dimensional measurement in soil samples tri-axial deformation test, a new 3D reconstruction method based on single image-signs-structure method is proposed.Because the points whose object distances are different have different prospective changes in the image, 3D information can be extracted from the two-dimensional image and the three-dimensional reconstruction are realized.Three-dimensional reconstruction based on binocular or multi-lens images is the more common approach.However,this method is under influence of light noise, and distortion features geometry,physical properties of the surface characteristics and cameras features.In addition,the necessary test equipment is extremely complicated.In order to overcome these difficulties,a single image can be used to replace more images to make three dimensional reconstruction.The calculated results are also given, and explain these results are reasonable.