基于单目视觉测距的测高测面积方法

利用单目摄像头所建立的三维测距模型,提出了一种地面上任意物体实际高度测量的计算方法。同时为了克服双目视觉对应点匹配和面积计算所利用的像素当量产生的误差,提出了一种更精确的目标实际面积测量方法。首先,利用三维几何测距模型,推算得出地面上任意一点到摄像头的距离计算公式,并根据透射点几何转换得到一种地面上物体高度的测量方法。其次,依据成像模型,与特定选取的世界坐标系、摄像机坐标系、图像坐标系三者之间的关系,推算出一种新的测量目标实际面积的方法。最后通过实验对误差进行了分析,提出了误差来源与相应的解决思路,证实了该方法的有效性。

A Method for Measuring the Height and Area

Based on three-dimensional distance measurement, we propose a method to calculated the height of the ground object. In order to overcome the effects of corresponding point matching in binocular vision, and the measurement results error of the pixel equivalent used in area calculations, we propose a new and more accurate method for target area measurement. Firstly, using the three-dimensional distance measurement model, obtain a distance formula of an arbitrary point on the ground to the bottom of the camera. Secondly, based on the pinhole imaging model and the relationship between the selected specific model of world coordinate system and the camera coordinate system, calculating the actual height and the actual area of ??the target objects on the ground. Finally, we have experiments about the methods and analyze the experimental error. We also find the source of the error and present solutions, confirming the validity of the method.