Abstract: A computer implemented method for calibrating a camera comprises the following steps carried out by computer hardware components: activating a subset of a plurality of light sources according to a plurality of activation schemes, wherein each activation scheme indicates which of the plurality of light sources to activate; capturing an image for each activation scheme using the camera; and calibrating the camera based on the captured images.

Abstract: This document describes an improved method for identifying of characteristic points of a calibration pattern within a set of candidate points in an image of the calibration pattern. The method includes scaling a template arrangement of template points that corresponds to the calibration pattern to an initial size. The method uses the scaled template arrangement to determine potential characteristic points. The method then determines whether the potential characteristic points meet a termination criterion. If the termination criterion is not met, the scaling of the template arrangement is modified and the previous step and this step are repeated. If the termination criterion is met, the potential characteristic points are identified as the characteristic points. In this way, the described method provides a robust means to automatically identify the characteristic points in the image of the calibration pattern without having to determine the distance between a camera and the calibration pattern.

Abstract: A method for identification of characteristic points of a calibration pattern within an image includes: (i) overlaying a template arrangement of template points over the candidate point such that a principal point of the template points coincides with the candidate point, wherein the template arrangement corresponds to the calibration pattern or to a sub-pattern of the calibration pattern, (ii) for each template point of the template arrangement, except the principal point, identifying from the set of candidate points the candidate point closest to the template point, and (iii) determining a degree of deviation by summing the distances between each template point of the template arrangement, except the principal point, and the candidate point closest to this template point; and identifying as characteristic points of the calibration pattern all those candidate points of the set of candidate points with a degree of deviation below a deviation threshold.

Abstract: A method for identification of candidate points as possible characteristic points of a calibration pattern within an image of the calibration pattern includes the steps of determining spots within a filtered image de-rived from the image of the calibration pattern, with a spot being defined as a coherent set of pixels of the filtered image having pixel values exceeding a threshold; for each determined spot, calculating a central point of the determined spot; and identifying as candidate points all calculated central points.

Abstract: A heating device includes a housing, a primary induction coil, a controller circuit, and a secondary induction coil. The housing retains a camera lens. The primary induction coil is positioned proximate the housing and generates a magnetic field in response to receiving electrical power from a power supply. The controller circuit is in electrical contact with the primary induction coil and controls the electrical power delivered to the primary induction coil. The secondary induction coil overlays the primary induction coil and receives the magnetic field from the primary induction coil and generates heat. The secondary induction coil is in direct contact with a windshield of a vehicle and heats the viewing window when the primary induction coil receives the electrical power.

Abstract: A heating device includes a housing, a primary induction coil, a controller circuit, and a secondary induction coil. The housing is configured to retain a camera lens. The primary induction coil is positioned proximate the housing and configured to generate a magnetic field in response to receiving electrical power from a power supply. The controller circuit is in electrical contact with the primary induction coil and is configured to control the electrical power delivered to the primary induction coil. The secondary induction coil overlays the primary induction coil and is configured to receive the magnetic field from the primary induction coil and generate heat. The secondary induction coil heats the camera lens when the primary induction coil receives the electrical power.

Abstract: A method for calibrating the position and/or orientation of a camera, in particular a camera mounted to a vehicle such as a truck, relative to a calibration pattern includes the steps of: A] acquiring an image of the calibration pattern by means of the camera; B] determining at least one parameter of the image and/or of the calibration pattern or a sub-pattern of the calibration pattern as it appears in the image; C] transforming the image based on the at least one parameter; D] identifying characteristic points or possible characteristic points of the calibration pattern within the transformed image of the calibration pattern; E] deriving the position and/or orientation of the camera relative to the calibration pattern from the identified characteristic points or possible characteristic points; F] in dependence of a confidence value of the derived position and/or orientation of the camera and/or in dependence of the number of iterations of steps B to F so far, repeating steps B to F, wherein in step B the de

Abstract: A method for identification of characteristic points of a calibration pattern within a set of candidate points derived from an image of the calibration pattern includes the steps of: A. scaling a template arrangement of template points which corresponds to the calibration pattern or to a sub-pattern of the calibration pattern to an initial size; B.

Abstract: A method for identification of characteristic points of a calibration pattern within an image includes: (i) overlaying a template arrangement of template points over the candidate point such that a principal point of the template points coincides with the candidate point, wherein the template arrangement corresponds to the calibration pattern or to a sub-pattern of the calibration pattern, (ii) for each template point of the template arrangement, except the principal point, identifying from the set of candidate points the candidate point closest to the template point, and (iii) determining a degree of deviation by summing the distances between each template point of the template arrangement, except the principal point, and the candidate point closest to this template point; and identifying as characteristic points of the calibration pattern all those candidate points of the set of candidate points with a degree of deviation below a deviation threshold.

Abstract: Calibrating the orientation of a camera mounted to a vehicle includes providing calibration pattern defining at least two horizontal lines and two vertical lines; acquiring an image of the calibration pattern by means of the camera, the image having a first axis and a second axis corresponding to a horizontal axis and a vertical axis, respectively; identifying the horizontal lines and the vertical lines within the image; determining a horizontal vanishing point from the representations of the horizontal lines; determining a vertical vanishing point from the representations of the vertical lines; calculating a roll angle from the location of the horizontal vanishing point based on the image, calculating a yaw angle from a first coordinate of the horizontal vanishing point measured along the first axis, and calculating a pitch angle from a second coordinate of the vertical vanishing point measured along the second axis.

Abstract: A method for identification of candidate points as possible characteristic points of a calibration pattern within an image of the calibration pat-tern includes the steps of determining spots within a filtered image de-rived from the image of the calibration pattern, with a spot being defined as a coherent set of pixels of the filtered image having pixel values exceeding a threshold; for each determined spot, calculating a central point of the determined spot; and identifying as candidate points all calculated central points.

Abstract: A process for supporting mobile-site communication with a fixed-site in a wireless communication system wherein the mobile-site includes a controller and a plurality of transceivers is described. The process includes, at a mobile-site, assigning and programming at least one transceiver from the plurality of transceivers to monitor at least one first channel on at least one fixed-site, receiving a message on the at least one first channel identifying a call for one or more subscriber units operable in the mobile-site, assigning a second channel for the call on the mobile-site and informing the one or more subscriber units affected by the call of the assigned second channel of the call, and propagating the call on the assigned second channel to/from the subscriber units affected by the call.