Axis Patente

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There is provided a method and an apparatus for updating a background model used for background subtraction of an image. An image (220) is received and each pixel in the image is classified as being foreground (232) or background (234) by performing background subtraction using a background model which comprises a collection (240) of background samples for each pixel in the image (220). For each pixel (228) in the image being classified as background (234), the background model is updated by selecting a background sample (242) in the collection of background samples associated with the pixel which fulfils a similarity condition, and replacing the background sample (242) which fulfils the similarity condition with image data of the pixel (228).

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The present invention relates to a technology for allowing access to an area having a blocked entrance, wherein the blocking of the entrance is controlled by an access controller arranged to unblock said entrance upon receipt of an authorised credential. The technology is implemented to repeatedly updating an override credential in the access controller, sending updated override credential the access controller to a remote node, repeatedly checking the connectivity between the remote node and the access controller, detecting failure of connectivity between the access controller and the remote node, setting the override credential as an authorised credential in the access controller in response to said detection of failure of connectivity, and allowing access through the blocked entrance upon receipt of the override credential in an access request to the area received by the access controller.

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The present invention relates generally to video communication systems, and more specifically to a method and device for adjusting properties of a graphical overlay (102) for a video stream, the adjusted properties being at least one of a position, a degree of animation and a color composition of the graphical overlay and the adjustment is based on a scene depicted by the time period of the video stream. The adjustment is performed if an estimated bitrate for transmitting an encoded bitstream comprising the time period of the video stream and the graphical overlay exceeds a predetermined upper threshold bitrate for transmitting an encoded single bitstream comprising the time period of the video stream and the graphical overlay.

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A lens arrangement (100) for a monitoring camera (200) and a monitoring camera (200) comprising such a lens arrangement (100) is provided. The lens arrangement (100) comprising: a lens member (102) having a connection portion (108) provided with an outer thread (110), an adjustment member (104) having a through hole (112) for receiving the connection portion (108) and being provided with an inner thread (114) corresponding to the outer thread (110), a holder member (106) having a receiving portion (116) for receiving the connection portion (108) and being provided with an inner thread (118) corresponding to the outer thread (110), wherein the lens arrangement (100) is assembled by the connection portion (108) of the lens member (102) being screwed into the through hole (112) of the adjustment member (102) and further into the receiving portion (116) of the holder member (106), wherein the receiving portion (116) of the holder member (106) has a top engagement surface 120 and the adjustment member (104) has a bottom engagement surface (113), wherein the adjustment member (104) is movable relative the holder member (106) by screwing between a non-engaging state and an engaging state of the lens arrangement (100) in which engaging state the bottom engagement surface (113) of the adjustment member (104) wedgingly engages with the top engagement surface (120) of the receiving portion (116) of the holder member (106) for locking the lens member (102).

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A locking device (10, 60, 70, 80) for locking an image sensor element (20) in a camera (1), a camera (1) comprising such a locking device (10, 60, 70, 80) and a method for controlling image stabilization in a camera (1) comprising such a locking device (10, 60, 70, 80) are disclosed. The locking device comprises two locking arrangements (102, 104, 601, 602, 701, 702, 801, 802) which are superimposed such that one or more locking holes (101a, 101b, 103a, 103b, 604, 605, 606, 607, 703, 704, 705, 706, 803, 804, 805, 806) of the locking arrangements at least partly overlap each other in pairs so as to form two open sections (105a, 105b, 608, 609, 708, 709, 808, 809) adapted to each receive a locking protrustion (203, 204, 201', 202', 201 ", 202", 201'", 202"'). The locking device is adjustable between a locked mode and an unlocked mode.

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An image stabilization mechanism for a camera is provided. The mechanism comprises a movement sensor capable of sensing motion of the camera, an element in an optical path of the camera, a ball and a plate acting as a bearing allowing for the element to move in a plane orthogonal to the optical path, an actuator mechanism capable of moving the element in the plane, and a processor configured to control the actuator to move the element as a response to motion of the camera as detected by the movement sensor, thereby stabilizing images from the camera. Furthermore, the processor further is configured to move the element along a secondary motion path so as to distribute wear on the plate created by the ball, and the processor is further capable of compensating for an image shift created by the secondary motion path by other means for shifting the image

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The present invention relates to an apparatus and a method for controlling a heating device (32) in a motorised camera directing arrangement (10) including a motor device (25, 27). The method comprising measuring a voltage over the motor device (25, 27), measuring a current conducted at least to the motor device (25, 27), measuring a temperature relating to the motorised camera directing arrangement (10), controlling power distributed to the heating device (32) based on the measured temperature and on the measured current, and feeding power to the heating device (32) independent of the measured temperature and the measured current in the event that the measuring of the voltage over the motor device indicates a voltage level higher than a predetermined threshold value.

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A network status measuring system is presented. The system is configured to measure a status of a network and for displaying a graphical representation of the status of the network, wherein the network comprises nodes connected by links. The system comprises a processor; a display circuitry configured to display (S304) a schematic overview of the network on a display; a data traffic measuring circuitry configured to measure (S302) bit rate and latency on links of the network; and a graphic generating circuitry configured to generate (S306) a graphical representation of a bit rate and a latency measured on a particular link of the network by generating objects to be displayed at the particular link of the network in connection with the schematic overview of the network. The processor is configured to calculate a number of the objects to be displayed at the particular link of the schematic overview of the network based on the bit rate measured on the particular link of the network. The processor is further configured to calculate a velocity of the objects to be displayed at the particular link of the schematic overview of the network based on the latency measured on the particular link of the network. The display circuitry is further configured to display (S308) the generated objects at the particular link of the schematic overview of the network. A higher number of objects indicates that data is transported over a particular link at a higher bit rate than at another link presented as having a lower number of objects. Moreover, the objects are traveling along a line, which indicates the particular link, at a specific velocity. This velocity of the objects indicates the latency of the link. The system may be implemented in one of the nodes of the network or may be distributed to be implemented in a plurality of the nodes of the network. The system may further comprise a discriminator which is configured to discriminate for what links of the network the graphical representation of the bit rate and the latency of the corresponding link of the network shall be generated.

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The present invention relates generally to video communication systems, and more specifically to a method and device (400) for determining a degree of animation (104) of a graphical overlay (102) for a video stream based on a degree of movement in the video stream.