AUTOMATIC CAMERA CALIBRATION

摘要

This document describes systems, methods, devices, and other techniques for automatically calibrating a video camera based on video information received from the video camera. In some implementations, a computing device receives video information comprising a video signal from a video camera, wherein the video signal shows a 2D scene of an environment captured by the video camera; identifies (i) two or more vertical lines shown in the 2D scene, (ii) two or more horizontal lines shown in the 2D scene, and (iii) one or more objects shown in the 2D scene; based on the identified one or more objects, determines a height of a vertical line in the 2D scene; and based on (i) the identified two or more vertical lines, (ii) the identified two or more horizontal lines, and (iii) the determined height of the vertical line in the 2D scene, calibrate the video camera.

主权项

1. A computer-implemented method comprising:
receiving, at a computing system, video information comprising a video signal that shows a two-dimensional (2D) scene of an environment from a first field of view of a video camera that captured the video signal; identifying, by the computing system, (i) two or more vertical lines that the video signal shows in the 2D scene, (ii) two or more horizontal lines that the video signal shows in the 2D scene and are orthogonal to the two or more vertical lines, and (iii) one or more objects that the video signal shows in the 2D scene; based on characteristics of the identified one or more objects, determining a height of a first vertical line in the 2D scene; and based on (i) the identified two or more vertical lines, (ii) the identified two or more horizontal lines, and (iii) the determined height of the first vertical line shown in the 2D scene, calibrating the video camera.