Abstract: A method of comparing a test image with a set of reference images. The method: divides the test image into one or more test regions; for each test region, compares the test region with one or more reference regions in one or more reference images and identifies the reference region that most closely corresponds to the test region; and generates a comparison value from the comparisons of the test regions with their correspondingly identified reference regions.

Abstract: A video camera arrangement comprises an image capture device; a face detector for detecting human faces in the captured video material and for generating face data identifying detected occurrences of faces in the captured video material; a data handling medium by which data representing the captured images is transmitted and/or stored; and a processor for generating data to be transmitted or stored by the data handling medium in dependence on the detection of faces in the captured images.

Abstract: A video network comprises: a plurality of video sources to launch onto the network first, higher resolution, video data and second, lower resolution, video data providing a lower resolution representation of the higher resolution video data; at least one destination device operable to process video received via the network; a network switch for selectively routing data from the video sources to the destination devices; and a network control arrangement connected to the network switch and having: a display device; a graphical user interface (GUI) arranged to display, on the display device, the lower resolution representations of video data from at least a subset of the plurality of sources together with identifiers associating the lower resolution representations with the respective sources; means for user selection, by use of the GUI, of a source of video of the higher resolution and a corresponding destination device; and means for controlling the routing of the higher resolution video data from the selected

Abstract: Video data processing apparatus, the video data comprising a sequence of images comprises: an object tracker operable to detect the presence of one or more objects within an image and to track a detected object across successive images; an identity associator operable to associate an identity with an object tracked by the object tracker; a counter operable, for a first and second identity, to count the number of images within which a tracked object associated with the first identity and a tracked object associated with the second identity have both been detected; and a similarity detector operable to determine whether two tracked objects are similar in appearance; the identity associator being operable to change the identity associated with a first tracked object to the identity associated with a second tracked object if: (a) the similarity detector determines that the first and second tracked objects are similar in appearance and (b) the count corresponding to the identities associated with the first and sec

Abstract: An image processing method for selecting a subset of n (where n is two or more) images representative of a test set of images comprises the step of: detecting a degree of similarity between images in the test set of images, so that the subset of images comprises those n images having substantially the lowest similarity with other images in the set.

Abstract: A display arrangement comprises an image display device having a first camera directed towards positions adopted by users viewing the display; one or more further cameras directed towards other respective locations; a face detector for detecting human faces in images captured by the cameras; and means for detecting those faces which appear in images captured by both the first camera and at least one of the further cameras.

Abstract: A display arrangement comprises an image display device having two or more sets of images for display; a camera directed towards positions adopted by users viewing the display; a face detector for detecting human faces in images captured by the camera, the face detector being arranged to detect faces in at least two face categories; and means, responsive to the a frequency of detection of categories of faces by the face detector at one or more different periods, for selecting a set of images to be displayed on the image display device at that time of day.