Abstract: A head-mountable display comprises a frame configured to be mounted on a user's head. The frame defines left and right-hand eye display positions that are positioned in front of the respective eyes of the user. A left-hand display element is mounted with respect to the left-hand eye display position, and is operable to provide an image from a left-hand video signal to the user's left eye. A right-hand display element mounted with respect to the right-hand eye display position, and is operable to provide an image from a right-hand video signal to the user's right eye. At least one light emitting element is positioned on a right-hand periphery of the left-hand display element and at least one light emitting element is positioned on a left-hand periphery of the right-hand display element. A controller controls light emitted by the light emitting elements dependent upon the video signals to reduce luning.

Abstract: A head-mountable display (HMD) comprises a frame for mounting on a user's head, a camera mounted on the frame for capturing a view of the user's eyes, a motion detector for detecting motion of the HMD and for generating a motion signal representing a movement of the HMD with respect to time, and a controller. The controller estimates a distance between the user's eyes by capturing a relative separation of the user's eyes from an image of the user's eyes captured by the camera at a start position. The controller processes a motion period of the motion signal, and estimates a displacement of the user's eyes with respect to the frame. The HMD can adjust a relative position at which a first image is displayed to one eye and position at which a second image is displayed to the other eye for an improved viewing experience.

Abstract: A book for use in an augmented reality system comprises a plurality of leaves, each side forming a page of the book, with each page comprising a fiduciary marker. The book also includes a cover having larger dimensions than the book's leaves. Thus, the cover's extremities extend beyond the outer edges of the pages. The inside of the cover comprises a first high contrast pattern along at least a first such extremity. An entertainment device for use in the augmented reality system comprises input means to receive a video image of the book, and image processing means to estimate a position and orientation of the book from a fiduciary marker of the book captured in the video image, to estimate a position and orientation of the first high contrast pattern, and to distinguish between one or more leaves of the book being turned independently of the cover of the book.

Abstract: A method of augmenting a video image comprises the steps of estimating the extent of an identified surface captured within the video image and identifying skin pixels within a test area corresponding to the estimated extent of the identified surface within the video image. The method also includes extrapolating positions for skin pixels within the video image that are outside the estimated extent of the identified surface based upon the identified skin pixels, generating a mask from a combination of identified skin pixels and extrapolated skin pixels, and setting an extent of a computer graphic to be superposed substantially on top of the identified surface within the video image. The extent is greater than the estimated extent of the identified surface. The method further includes superposing the graphical augmentation of the video image responsive to the generated mask.

Abstract: A method of incorporating an augmented reality video image into a virtual environment comprises detecting a state of a real-world control object captured in a video image and augmenting the video image responsive to the state of the control object. The method further includes calculating trajectory parameters for an action with respect to a local co-ordinate system of the video image, responsive to the state of the control object, and embedding the augmented video image within a 3D virtual environment. The method also includes calculating the trajectory parameters for the action with respect to a local co-ordinate system of the 3D virtual environment, and rendering a graphical effect corresponding to the action within the 3D virtual environment.

Abstract: A book for use with augmented reality applications includes a plurality of stiff leaves, each side of which forms a page of the book. On each page a respective fiduciary marker is positioned substantially in the middle of the page. Each fiduciary marker comprises a different respective asymmetric pattern capable of indicating the scale and orientation of the book to an augmented reality application and of indicating the respective page, and a non-alphanumeric pattern positioned closer to an outside edge of the page of the book than the fiduciary marker. The non-alphanumeric pattern on a respective page is capable of indicating at least the opposing page pair comprising the respective page on which the non-alphanumeric pattern is positioned, when used in conjunction with the scale and orientation of the book as indicated by a fiduciary marker on a different page to that of the respective non-alphanumeric pattern.

Abstract: An entertainment system comprises at least one input for receiving data representative of a reference dance performance, a dance analyser for generating data descriptive of an aspect of the reference dance, a key-point selector for selecting a plurality of key-points in the reference dance responsive to a property of the reference motion data, and an error tolerance calculator for generating error tolerance values at the plurality of key-points in the dance for use in scoring subsequent performances of the dance. The error tolerance values are responsive to a property of the reference motion data. An input may receive telemetry from one or more game controllers in communication with the entertainment system, in which the reference motion data comprises motion data generated by the dance analyser from the telemetry received from one or more game controllers whilst the controller(s) was held during the reference performance of the dance.

Abstract: An image transfer apparatus comprises an input operable to receive a signal comprising two non-stereoscopic images for different respective viewpoints of a virtual environment, a first output and a second output, and a signal splitter logic, and in which the signal splitter logic is operable to extract and separate the two non-stereoscopic images from the received signal, to format each of the two separated images for reception by a respective conventional 2D to display, and to output to the first output and the second output a respective signal comprising one of the two separate images.

Abstract: An image transfer apparatus comprises an input operable to receive a signal comprising two images for different respective non-stereoscopic viewpoints of a virtual environment, a first output operable to transmit a signal comprising the two images formatted as a stereoscopic image to at least a first display, and a transmitter operable to transmit control signals to at least two active shutter glasses, the control signals arranged to allow respective wearers of the glasses to only view a respective one of the two images.

Abstract: A method of assisting a first player of a videogame is provided. The method includes making a game state of the first player accessible to a second player. The game state describes a state of the videogame as played by the first player. The method also includes executing the videogame for the second player using the game state of the first player to define the initial state of the videogame for the second player, allowing the second player to play the videogame based upon the game state of the first player until a first predetermined criterion is met, and providing to the first player data for updating their game state in response to the play of the second player.

Abstract: A method of displaying successive stereoscopic image pairs comprises: capturing, at a predetermined image rate, a sequence of images suitable for a left eye of a viewer and capturing, at the predetermined image rate, a corresponding sequence of images suitable for a right eye of the viewer; and displaying a sequence of stereoscopic image pairs at the predetermined image rate, in which each displayed stereoscopic image pair comprises one left image suitable for the left eye of the viewer and one right image suitable for the right eye of the viewer, the one left and one right images being derived from the captured sequence of images suitable for the left and right eye of the viewer, respectively; in which: the one left image and the one right image of each stereoscopic image pair are displayed for different respective portions of an image period defined by the predetermined image rate; and the effective temporal position of the one left image of a stereoscopic image pair for display is different to the effectiv