Abstract: A method for setting a camera exposure time of a camera is disclosed. A moving indicator is overlaid in a video sequence of images. The speed of the moving indicator corresponds to an exposure time below which objects that move at an angular speed which is slower than the indicator will be imaged by the camera as sharp. The speed of the moving indicator is adjusted such that it moves at the same speed as a moving object in the video sequence of images. The camera exposure time is then set based on the exposure time that corresponds to the speed of the moving indicator after the speed adjustment.

Abstract: A method for facilitating color balance synchronization between a plurality of video cameras within a system of video cameras includes detecting an object in a video sequence captured by a video camera in the system, determining an object color histogram for the detected object, updating a camera specific reference color histogram using the determined object color histogram, and determining one or more camera specific color histogram compensation coefficients by comparing the camera specific reference color histogram with a system reference color histogram. A system for facilitating color balance synchronization between a plurality of video cameras includes a video camera being connectable to a network of video cameras.

Abstract: A scene is monitored by receiving image data representing a thermal image captured by a thermal image sensor (13) and a visual image captured by a visual image sensor (15), the thermal image and the visual image depicting a same view of the scene. Objects (9) are detected in the visual image and in the thermal image. A mask (17a) is defined in the view of the scene, and it is determined if an object (9) or an object part, inside the mask (17a), is present in both the thermal image and the visual image. If so, a modified mask (17b) is provided by excluding an area occupied by the object (9) or the object part from the mask (17a).

Abstract: The present invention relates to a method for encoding digital video data corresponding to a sequence of digital source images using a cache memory, each of the digital source images having an equal source image width corresponding to a first number of blocks, the cache memory having a cache width corresponding to a second number of blocks, wherein the second number of blocks is smaller than the first number of blocks.

Abstract: Surveillance camera comprising a camera housing and a transparent view port cover, the camera housing including a top surface and a side surface, the side surface is extending along the periphery of the top surface is connected to the top surface, the transparent view port cover is asymmetrically arranged on the camera housing, is arranged to cover an opening in the camera housing, is curved, and is protruding over the top surface of the camera housing.

Abstract: There is provided a method for determining the reliability of a fault detection of a camera in a camera system. According to the method data relating to environmental conditions are received (204) and compared to accessed (202) criteria relating to environmental conditions external to the camera and affecting the reliability of the fault detection test. If the received data complies with the criteria it is determined (206) that the fault detection test gives a reliable result. This is advantageous in that false fault detection tests may be identified.

Abstract: There is provided a method for determining the reliability of a fault detection of a camera in a camera system. According to the method data relating to environmental conditions are received (204) and compared to accessed (202) criteria relating to environmental conditions external to the camera and affecting the reliability of the fault detection test. If the received data complies with the criteria it is determined (206) that the fault detection test gives a reliable result. This is advantageous in that false fault detection tests may be identified.

Abstract: There is provided a method for configuring a set of image capturing settings of a camera for a first scene condition type currently viewed by the camera. The method comprises detecting the first scene condition type; instructing the camera to acquire a plurality of test images, each test image corresponding to a set of image capturing settings; receiving input relating to a selected test image, and storing the set of image capturing settings corresponding to the selected test image as the configured set of image capturing settings for the first scene condition type to be used by the camera upon future detections of the first scene condition type.

Abstract: The present invention relates to a mount for a wired device, the mount comprising: a base (10), an attachment part (20) provided with a terminal (21), and an eccentric hinge (14) having a first pivot (15) a second pivot (16), said second pivot (16) being movable relative said first pivot (15) in a plane defined by a first direction X parallel to said mount plane (42) and by a second direction Z normal to said mount plane (42), said attachment part (20) being releasably connectable to said base (10) by means of said eccentric hinge (14), wherein said attachment part (20), when connected to said base (10), is movable between an open position, providing access to said terminal (21), and a closed position. The distance (d) between said first pivot (15) and said second pivot (16) in said closed position has a first component (dX) in said first direction X and a second component (dZ) in said second direction Z, said first component (dX) being greater than said second component (dZ).

Abstract: A method of monitoring a scene by a camera (7) comprises marking a part (14) of the scene with light having a predefined spectral content and a spatial verification pattern. An analysis image is captured of the scene by a sensor sensitive to the predefined spectral content. The analysis image is segmented based on the predefined spectral content, to find a candidate image region. A spatial pattern is detected in the candidate image region, and a characteristic of the detected spatial pattern is compared to a corresponding characteristic of the spatial verification pattern. If the characteristics match, the candidate image region is identified as a verified image region corresponding to the marked part (14) of the scene. Image data representing the scene is obtained, and image data corresponding to the verified image region is processed in a first manner, and remaining image data is processed in a second manner.

Abstract: The present invention relates to a method (300) for reducing stray light in an output image of a scene, said method comprising; providing (301) a camera (100) comprising a lens assembly (102, 202), providing (302) an aperture unit (103, 203) having an aperture gate (204a, 204b) in an aperture plane being orthogonal to an optical axis (OA) of said lens assembly (102, 202), said aperture gate (204a, 204b) being adjustable in said aperture plane, acquiring (303), by means of said camera (100), a plurality of images of said scene, wherein each image of said plurality of images is acquired using an unique aperture gate setting, wherein each of said unique aperture gate settings correspond to a unique combination of a position and a shape of said aperture gate (204a, 204b) in said aperture plane, analyzing (305) said plurality of images for generating data pertaining to a difference in stray light content with respect to said plurality of images, and producing (306) said output image based on said data pertaining t

Abstract: There is provided a method for configuring a set of image capturing settings of a camera for a first scene condition type currently viewed by the camera. The method comprises detecting the first scene condition type; instructing the camera to acquire a plurality of test images, each test image corresponding to a set of image capturing settings; receiving input relating to a selected test image, and storing the set of image capturing settings corresponding to the selected test image as the configured set of image capturing settings for the first scene condition type to be used by the camera upon future detections of the first scene condition type.

Abstract: A digital video camera that includes a photo sensor having a plurality of pixels, each pixel being arranged to obtain and output pixel data, a focusing device to set a focus of the digital video camera, a processing unit to process pixel data from a first subset of the pixels such that image frames of said video image stream are rendered based on pixel data in said first subset of pixels, and an array of micro lenses covering a second subset of the pixels, each of said micro lenses covering a number of pixels. The first subset of pixels is confined within an area and the second subset of pixels is arranged outside and adjacent to said first subset of pixels such that a frame of pixels of said second subset is formed around said first subset of pixels.

Abstract: A method for determining a tilt of an image sensor surface plane in a camera in relation to a lens reference plane of the camera includes sending light onto the image sensor, receiving light reflected from the image sensor, identifying an interference pattern in the reflected light, identifying a feature of the interference pattern, and determining the tilt of the image sensor surface plane based on a position of the feature identified in the interference pattern.

Abstract: A pan-tilt camera is arranged to include a camera head, a stationary unit, an intermediate member arranged between the camera head and the stationary unit, a first rotary joint rotatably connecting the camera head to the intermediate member, and a second rotary joint, rotatably connecting the intermediate member to the stationary unit. A communication path is provided between the camera head and the stationary unit, including an optical waveguide arranged between the camera head and the stationary unit. The optical waveguide has a first end positioned at the first rotary joint to receive light from the camera head through the first rotary joint. The other end of the waveguide is positioned at the second rotary joint and is arranged to send light to the stationary unit through the second rotary joint.

Abstract: A method, performed by a monitoring device, may include detecting a temperature change, greater than a temperature change threshold, from a previous temperature to a current temperature; retrieving a trend-based motor position setting for a focus motor from a trend statistics memory based on the current temperature; and selecting a starting motor position setting for the focus motor based on the retrieved trend-based motor position setting or a current motor position setting. The method may further include performing a just noticeable difference modification on the focus motor using the selected starting motor position setting, wherein the just noticeable difference corresponds to a change in a motor position setting that results in a perceivable change in a focus level of the monitoring device, and selecting a temperature adjusted motor position setting for the focus motor based on a result of the just noticeable difference modification.

Abstract: A top cover assembly for a monitoring camera assembly that includes a mounting portion arranged for attachment to a mounting base for a monitoring camera, a dome window arranged on the mounting portion and a lining arranged at an inside of the dome window, the lining having a camera view opening adapted to a field of view of the monitoring camera and being rotatable in relation to the mounting portion, and the lining having a guiding portion arranged for engagement with a camera mounting bracket on the mounting base to position the lining in relation to the monitoring camera such that the camera view opening covers the field of view of the monitoring camera, when mounting the top cover assembly on the mounting base, thereby allowing the mounting portion to be rotated in relation to the lining into a position for attaching the mounting portion to the mounting base.

Abstract: A monitoring camera is arranged to monitor a wide angle image view. The camera comprises an event detector arranged to signal that an event has occurred when an alert line/tripwire positioned in the wide angle image view has been crossed. The alert line is defined as a line enclosing a point of the wide angle image view. A method for monitoring an area using the monitoring camera comprises capturing images representing a wide angle view through a wide angle lens, detecting if an object in the images is crossing an alert line defined in the wide angle view as a line enclosing a point in the wide angle view, and in response to a detection of an object crossing the alert line, redirecting the camera from capturing images through the wide angle lens to a position capturing an image view including the area in which the alert line was crossed.

Abstract: A method for de-interlacing interlaced video includes receiving a first video field and a second video field of an interlaced video frame, generating a first video frame from the first video field and a first synthesized video field, where video data of the first synthesized video field is based exclusively on video data of the first and second video fields, generating a second video frame from the second video field and a second synthesized video field, where video data of the second synthesized video field is based exclusively on the video data of the first and second video fields, and outputting two de-interlaced video frames for every received interlaced video frame. The first (second) synthesized video field is generated by combining image data from the second (first) video field with image data from corresponding lines of an up-scaled first (second) field generated by a scaler.

Abstract: An object counter performs a method for estimating the number of objects crossing a counting boundary. The method comprising: capturing, during a time period, a plurality of images representing moving images; registering, from the captured images, motion region areas passing across the counting boundary; calculating the integral of the registered motion region areas for forming a resulting total motion region area; and estimating the number of objects that have crossed the counting boundary by dividing the resulting total motion region area by a reference area.