METHOD FOR CALIBRATION OF THE CAMERA INSTALLED BEHIND THE WINDSCREEN ON THE CAR Russian patent published in 2021 - IPC G08G1/04 G06K9/66 B60R1/00 G06T7/33 G06T7/80 

FIELD: traffic safety.

SUBSTANCE: invention relates to methods for ensuring the safety of driving a car by increasing the accuracy of the driver’s warning systems about changing lanes and about a dangerous approach to the car in front. The method for dynamic external calibration of the camera on the car, installed behind the windscreen of the car and directed forward in the direction of movement, is that a sequence of frames is recorded during the movement of the car during calibration, a matrix M is formed, information about the intersection points in the so-called vanishing point is accumulated in the matrix cells, the obtained trajectories are periodically checked for length and straightness, short and strongly deviating from the straight line are not taken into consideration, the remaining trajectories are approximated by straight lines, and the points of their pairwise intersection are summed up in the corresponding cells of the matrix M, knowing the pixel coordinates of the averaged vanishing point, the camera installation angles are determined, such as the pitch angle and yaw angle.

EFFECT: improved calibration accuracy is achieved while driving.

1 cl, 2 dwg