Traffic camera calibration update utilizing scene analysis

摘要

Methods and systems are disclosed for updating camera geometric calibration utilizing scene analysis. Geometric calibration parameters can be derived with respect to one or more cameras and selected reference points of interest identified from a scene acquired by one or more of such cameras. The camera geometric calibration parameters can be applied to image coordinates of the selected reference points of interest to provide real-world coordinates at a time of initial calibration of the camera(s). A subset of a video stream from the camera(s) can then be analyzed to identify features of a current scene captured by the camera(s) that match the selected reference points of interest and provide a current update of the camera geometric calibration parameters with respect to the current scene.

主权项

1. A method for updating camera geometric calibration utilizing scene analysis, said method comprising:
receiving initial camera geometric calibration parameters with respect to at least one camera; discovering reference points of interest from an initial reference frame in a scene acquired by said at least one camera; applying said camera geometric calibration parameters to image coordinates of said discovered reference points of interest to provide real-world coordinates of said discovered reference points of interest; analyzing a subset of a video stream from said at least one camera to identify feature points of a current scene captured by said at least one camera that match said discovered reference points of interest; and providing a current update of said camera geometric calibration parameters with respect to said current scene.