Axis Ab

Johan Nystrom

Björn Ardö

Xing Danielsson Fan

Björn Benderius

Can Xu

Dennis Nilsson

Methods and apparatus, including computer program products, implementing and using techniques for reducing bitrate from a monitoring camera. A first input is received that identifies first regions of an image representing a camera field of view. The first regions contribute significantly to the bitrate. A second input is received that identifies second regions of the image. The second regions contain information that is deemed to be of little visual interest to a user of the monitoring camera. Third regions of the image are determined. The third regions are regions where the first and second regions overlap at least in part. Video encoder settings are applied to force skip blocks in at least some of the third regions, thereby reducing contributions to the bitrate from the third regions.

Using a skip block mask to reduce bitrate from a monitoring camera

A method and apparatus are disclosed. The method may include determining a current zoom value of a camera and determining a first modulation transfer function of a transparent dome of the camera. The method may include applying a first low-pass filter to an image captured by the camera based on the current zoom value and the first modulation transfer function of the transparent dome.

Image noise reduction based on a modulation transfer function of a camera dome

The present invention relates to a method, an encoder, a computer program product, and a system for real-time encoding. The encoder is arranged to receive movement information about a movement of a camera, the encoder being arranged to encode, in real-time, a video stream acquired by the camera during the movement of the camera, wherein the encoder is arranged to encode based on said movement information. The movement information may be stored in a memory.

Method and device for real-time encoding

Autofocusing a camera while zooming may include zooming the lens to a first zoom position, measuring a first object distance from the camera to an object on which to focus, determining a first focus start position using the first object distance, performing a first autofocus using the first focus start position as a starting point, thereby determining a first focus position. A first lookup object distance may be determined based on the first determined focus position. A first correction factor may be calculated as a ratio between the first lookup object distance and the first object distance. The lens may be zoomed to a second zoom position, and a second focus position may be determined using a second object distance based on the first object distance and a second correction factor based on depths of field at the second and first zoom positions.

Method of performing autofocus, autofocus system, and camera comprising an autofocus module

The present invention relates generally to auto focus algorithms for setting a focus of a camera. More specifically, the present invention relates to a method () and device for setting a focus of a camera wherein a camera motion level of the camera is continuously measured (S) during the read-out of pixel data by a rolling shutter image sensor and wherein the auto focus algorithm uses weighted focus measures which are calculated (S) using the continuously measured camera motion levels.

Method and device for setting a focus of a camera

A monitoring camera arranged to monitor a scene and a method of controlling camera settings for a monitoring camera arranged to monitor a scene wherein images are captured of different parts of the scene by altering a field of view of the camera, wherein data defining a camera settings control area within the scene is accessed, and it is determined if there is an overlapping region between a current field of view of the camera and the camera settings control area, and if there is an overlapping region, camera settings are controlled based on the overlapping region.

Monitoring method and camera

A method and mobile unit facilitate installation of a surveillance camera for monitoring an object of interest in a scene. The surveillance camera acquires a zoomed out image of the scene. The zoomed out image is displayed in a display wherein the zoomed out image has a zoomed out center point. An indicator overlaid on the displayed zoomed out image is displayed in the display, wherein the indicator and the zoomed out center point are displaced in relation to each other by a deviation. The indicator indicates the position of a zoomed in center point of a zoomed in image of the scene. The surveillance camera is directed so that the position of the object of interest and the indicator coincide so that the object of interest is included in a zoomed in image of the scene.

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Vellinge, Sweden

Johan Nystrom