Abstract: A video display apparatus for displaying a catalogue of one or more candidate video items for replay, each video item being represented in the catalogue by a catalogue entry having at least one displayed representative image comprises a user control device operable to resize a displayed catalogue entry by a select-and-drag operation; and means responsive to a resizing of a catalogue entry to select a number of distinct representative images, for display in respect of that video item, so that the number displayed increases with increasing size of the catalogue entry while the display size of each representative image stays substantially constant with respect to changes in the catalogue entry size.

Abstract: A video display apparatus for displaying a catalogue of one or more candidate video items for replay, each video item being represented in the catalogue by a catalogue entry having at least one displayed representative image comprises a user control device operable to resize a displayed catalogue entry by a select-and-drag operation; and means responsive to a resizing of a catalogue entry to select a number of distinct representative images, for display in respect of that video item, so that the number displayed increases with increasing size of the catalogue entry while the display size of each representative image stays substantially constant with respect to changes in the catalogue entry size.

Abstract: A video display apparatus for displaying a catalog of one or more candidate video items for replay, each video item being represented in the catalog by a catalog entry having at least one displayed representative image comprises a user control device operable to resize a displayed catalog entry by a select-and-drag operation; and means responsive to a resizing of a catalog entry to select a number of distinct representative images, for display in respect of that video item, so that the number displayed increases with increasing size of the catalog entry while the display size of each representative image stays substantially constant with respect to changes in the catalog entry size.

Abstract: Video processing comprises storing data relating to images of a video signal captured over at least a reference period relative to a current image of the video signal; comparing the current image with a reference image of the video signal captured within the reference period, so as to detect image features in the current image representing changes with respect to a corresponding position in the reference image; detecting whether a detected image feature in the current image has remained at substantially the same image position over a group of images preceding the current image; and displaying the current image with an indication of any such image features and an indication of the duration of the presence of the image feature at that image position.

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes; comprises a search arrangement for selecting a subset of the information items by applying a user-defined search query against the information items, the search arrangement being operable to detect a degree of relevance of each information item in the subset to the search query; and a graphical user interface for displaying a representation of those nodes corresponding to at least some of the subset of information items as a two-dimensional display array of display points within a node display area on a user display; the graphical user interface being operable to display the display points with respective display properties dependent on the detected degree of relevance of the corresponding information item.

Abstract: Video processing comprises storing data relating to images of a video signal captured over at least a reference period relative to a current image of the video signal; comparing the current image with a reference image of the video signal captured within the reference period, so as to detect image features in the current image representing changes with respect to a corresponding position in the reference image; detecting whether a detected image feature in the current image has remained at substantially the same image position over a group of images preceding the current image; and displaying the current image with an indication of any such image features and an indication of the duration of the presence of the image feature at that image position.

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes; the system comprising: a user control for defining a search criterion for selecting information items; a detector for detecting those positions within the array of nodes corresponding to the selected information items; a graphical user interface for displaying a two-dimensional display array of display points representing those positions within the array of nodes corresponding to the selected information items; and a processor responsive to the selected information items, for providing a representation which is generally representative of the information content of the selected information items.

Abstract: A method of processing information items, the method comprises the steps of: for an information item comprising primarily text information: analysing text information of the information item to detect a set of constituent information elements relating to that information item; detecting for each of the constituent information elements a respective degree of relative significance based on the frequency and/or nature of occurrence of the constituent information elements with respect to that information item; selecting a subset of at least two most significant constituent information elements; and generating a pseudo-image representative of the information item, the representative pseudo-image comprising the selected subset of constituent information elements arranged in a predetermined image layout such that: the most significant constituent information element of the subset is represented with most prominence and at a first predetermined region within the representative pseudo-image; and the one or more oth

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes comprises: a graphical user interface for displaying a representation of at least some of the nodes as a two-dimensional display array of display points within a display area on a user display; a user control for defining a two-dimensional region of the display area; and a detector for detecting those display points lying within the two-dimensional region of the display area; the graphical user interface also displaying a list of data representing information items, being those information items mapped onto nodes corresponding to display points displayed within the two-dimensional region of the display area.

Abstract: A method for analysing a plurality of stored images comprising the steps of: dividing each of the plurality of the stored images into a plurality of segments; deriving a plurality of sets of segments, each set comprising different combinations of said segments to the other sets; deriving feature data corresponding to a property of each set of segments; and storing said derived feature data in association with said stored image.

Abstract: An information retrieval apparatus is described for searching a set of information items and displaying the results of the search, the information items each having a set of characterizing information features. The apparatus comprises a search processor to search information items in accordance with user-defined characterizing information features and identify information items with corresponding characterizing information features. A mapping processor generates a map of information items, similar information items mapping to similar positions in the array, from a set of information items identified in the search. The apparatus includes a graphical user interface with a user control for selecting information items, and the search processor refines the search to identify information items relating to the selected information item. As such the user is provided with a facility for refining a search, and searching and navigating large amounts of data are thereby made easier.

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes; the system comprising: a user control for defining a search criterion for selecting information items; a detector for detecting those positions within the array of nodes corresponding to the selected information items; a graphical user interface for displaying a two-dimensional display array of display points representing those positions within the array of nodes corresponding to the selected information items; and a processor responsive to the selected information items, for providing a representation which is generally representative of the information content of the selected information items.

Abstract: An information retrieval apparatus includes a mapping processor operable to receive data representative of a map of information items from a set of information items identified in a search. The map provides the identified information items with respect to positions in an array in accordance with a mutual similarity of the information items. The map data is arranged to the effect that similar information items map to similar positions in the array. The mapping processor is operable to process the map data to form a hierarchical clustering of information items providing a first clustering level of information items and at least one other clustering level of information items for clusters of information items within the first level clusters. The formation of the information items into clusters in accordance with a hierarchical arrangement facilitates navigation and display of the information items.

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes; the system comprising:

Abstract: An information retrieval system in which a set of distinct information items map to respective nodes in an array of nodes by mutual similarity of the information items, so that similar information items map to nodes at similar positions in the array of nodes comprises: