| 摘要 |
A camera at a fixed vertical height positioned above a reference plane, with an axis of a camera lens at an acute angle with respect to a perpendicular of the reference plane. One or more processors receive images of different people. The vertical measurement values of the images of different people are determined. The one or more processors determine a first statistical measure associated with a statistical distribution of the vertical measurement values. The known heights of people from a known statistical distribution of heights of people are transformed to normalized measurements, based in part on a focal length of the camera lens, the angle of the camera, and a division operator in an objective function of differences between the normalized measurements and the vertical measurement values. The fixed vertical height of the camera is determined, based at least on minimizing the objective function. |
| 主权项 |
1. A method for determining a height of a camera, the camera at a fixed vertical height positioned above a reference plane, an axis of a lens of the camera at an acute angle with respect to a perpendicular of the reference plane, the method comprising the steps of:
receiving from the camera, a multiplicity of images of a multiplicity of different people; determining, by one or more processors, vertical measurement values of the multiplicity of images of the multiplicity of different people; determining, by one or more processors, a first statistical measure associated with a statistical distribution of the vertical measurement values; transforming, based on one or more processors, known heights of people from a known statistical distribution of heights of people, with respect to the first statistical measure, to normalized measurements of known heights of people, based in part on a focal length of the lens of the camera, the acute angle of the camera, and a division operator present in an objective function of differences between the normalized measurements of known heights of people and the vertical measurement values; and determining, by one or more processors, the fixed vertical height of the camera, based at least on minimizing the objective function of the differences between the normalized measurements of known heights of people and the vertical measurement values. |
