Axis Ab

Kent Fransson

Mathias Walter

Daniel Ahman

Morten Bergstrom

Mikael Persson

Christian Jacobsson

Samir Helaoui

Henrik Svedberg

Stefan Lundberg

Johan Nyström

Björn Berglund

Sven Svensson

Jesper Olavi

Kajsa Larsson

A method and a video capturing system for controlling at least one infrared (IR) illumination source, illuminating an area captured by a camera, the method comprising modulating emission from the IR illumination source between first and second emission intensities at a first frequency during a first predetermined time period. Upon capturing images using an image sensor of the camera during the first predetermined time period, determining a radiation level indicator for each of a plurality of images captured by the image sensor. Further, evaluating a sequence of determined radiation level indicators to determine whether a frequency resulting from the modulated emission at the first frequency is detected in the sequence of radiation level indicators. If the frequency resulting from the modulated emission at the first frequency is determined as not detected in the sequence of radiation level indicators, the IR illumination source is stopped.

Method for controlling infrared illumination source

A power control system for controlling operation of a first battery-powered device positioned at a remote location from a camera. The power control system includes a receiving module, a retrieving module, a comparison module, and a transmission module. The receiving module is configured to receive at least one of a pan angle and a tilt angle of the camera indicative of a field of view. The retrieving module is configured to retrieve a position of the first battery-powered device. The comparison module is configured to compare the pan angle and the tilt angle with the position of the first battery-powered device, and determine whether the first battery-powered device is positioned within the field of view of the camera based on the comparison. The transmission module is configured to transmit instructions to control power consumption of the first battery-powered device, based on the determination.

Operation control of battery-powered devices

Focusing of a monitoring camera () with day and night functionality comprises selecting a focusing day mode or a focusing night mode based on the camera being in day mode or night mode. In focusing day mode, an IR laser range meter () will measure a reference distance continuously, and in the focusing night mode the IR laser range meter will only measure reference distance in response to a focus trigger signal being activated, and during a predetermined time period. The focus distance of the camera is set based on the measured reference distance.

Focusing of a camera monitoring a scene

Monitoring camera

Growing community of inventors

Malmo, Sweden

Kent Fransson