vanish line

Instead of the adoption of camera calibration, the vanishing line in image plane is computed by means of parallel lines to obtain the affine reconstruction, the circular points in affine plane are computed using known relative lengths, known angles and equal unknown angles to implement the metric reconstruction.

该方法不必对摄像机定标,首先根据平行线来计算图像平面的消失线得到仿射重建,然后在仿射平面上利用直线之间的已知相对长度、已知角度和相等未知角来计算圆点得到度量重建。

In vertical ground objects based approach, vertical vanishing point and the plane vanishing line can be obtained by top-points and bottom-points of vertical objects(always, human).

基于地面垂直目标的标定方法,由垂直目标(人体)的头顶点和脚底点得到垂直消失点和水平消失线。

The horizontal vanishing line and the vertical vanishing point are computed from the extracted head-foot positions of the pedestrian contours,with all the parameters then deduced from the principal point and the vanishing point.

先对由不同位置的行人轮廓中提取出的头脚点位置信息进行筛选,再通过极大似然估计求解出消失点与水平消失线,并根据消失点与消失线信息计算出摄像机的内外参数和投影矩阵。