Abstract: A method includes generating, based on a distance map, a signal indicative of a quantification of a characteristic of a lumen of a tubular structure of interest over a pre-determined extent of the tubular structure of interest represented in volumetric imaging data. A system includes a quantifying component (216) that generates, based on a distance map, a signal indicative of a quantification of characteristic of a lumen of a tubular structure of interest over a pre-determined extent of the tubular structure of interest represented in volumetric imaging data. A method includes identifying voxels of 3D segmented imaging data that represent tubular structure of interest, determining distances between the identified voxels and nearest voxels corresponding to other structure in a plurality of 2D slices of the segment imaging data, representing the voxels with intensity values that are proportional to the distances, and generating a signal indicative of a 3D distance map based on the intensity values.

Abstract: A three dimensional display system comprises a display (207) presenting a plurality of views of a scene where each view corresponds to a viewing direction for the scene. A rendering unit (203) generates an image for each of the views. The rendering unit (203) is capable of generating differentiated images for neighboring views containing differentiated image data providing a three dimensional depth effect when neighboring views are viewed by different eyes of a viewer. A user processor (209) generates a user presence estimate in response to an attempted detection of a user in a viewing area for the display system. A 3D mode controller (213) modifies the three dimensional effect in response to the user presence estimate. For example, the display system may provide a two dimensional image when no user is present and a three dimensional image when a user is present. This may reduce discomfort experienced by viewers in suboptimal positions.

Abstract: A method includes generating, based on a distance map, a signal indicative of a quantification of a characteristic of a lumen of a tubular structure of interest over a pre-determined extent of the tubular structure of interest represented in volumetric imaging data. A system includes a quantifying component (216) that generates, based on a distance map, a signal indicative of a quantification of characteristic of a lumen of a tubular structure of interest over a pre-determined extent of the tubular structure of interest represented in volumetric imaging data. A method includes identifying voxels of 3D segmented imaging data that represent tubular structure of interest, determining distances between the identified voxels and nearest voxels corresponding to other structure in a plurality of 2D slices of the segment imaging data, representing the voxels with intensity values that are proportional to the distances, and generating a signal indicative of a 3D distance map based on the intensity values.

Abstract: A system of processing of three dimensional [3D] image data for display on a 3D display for a viewer is described. 3D display metadata defines spatial display parameters of the 3D display such as depth range supported by the 3D display. Viewer metadata defines spatial viewing parameters of the viewer with respect to the 3D display, such as viewing distance or inter-pupil distance. Source 3D image data arranged for a source spatial viewing configuration is processed to generate target 3D display data for display on the 3D display in a target spatial viewing configuration. First the target spatial configuration is determined in dependence of the 3D display metadata and the viewer metadata. Then, the source 3D image data is converted to the target 3D display data based on differences between the source spatial viewing configuration and the target spatial viewing configuration.

Abstract: A method of generating an occlusion image property map for an occlusion viewing position for a three dimensional scene is provided. The occlusion image property map comprises at least some image property values that are occluded from the occlusion viewing position. The method utilises an algorithm which can generate an image property map for an image representing the scene as a function of a viewing position. The method generates (701, 703) image property map for different viewing positions by performing the algorithm for these positions. The occlusion image property map is generated (705) from the image property maps of different viewing positions. Specifically, the image property maps may in some examples be shifted to the occlusion viewing position and data of the occlusion image property map is then selected as a pixel from the shifted image property maps which does not correspond to the most forward pixel (unless all pixels have equal depth).

Abstract: The invention relates to a device and method of providing a layered depth model of a scene, the layers of the depth model comprising primary view information for a primary view of the scene from a primary viewing direction and occlusion information associated with the primary view information for use in rendering in other views of the scene, wherein: the primary view information comprises layer segments of the model which are depth-wise closest with respect to the primary viewing direction, and the occlusion information comprises further layer segments of the model and wherein the occlusion in formation comprises a safety region (SR1, SR2, SR3, SR4) adjacent to a depth transition for which occlusion information is provided (J1, J2, J3, J4), and wherein the safety region comprises corresponding segments of the primary view information, and wherein the safety region (SR1, SR2, SR3, SR4) is located on that side of the respective depth transition which is depth-wise farthest away with respect to the primary viewi

Abstract: A three dimensional display system comprises a display (207) presenting a plurality of views of a scene where each view corresponds to a viewing direction for the scene. A rendering unit (203) generates an image for each of the views. The rendering unit (203) is capable of generating differentiated images for neighbouring views containing differentiated image data providing a three dimensional depth effect when neighbouring views are viewed by different eyes of a viewer. A user processor (209) generates a user presence estimate in response to an attempted detection of a user in a viewing area for the display system. A 3D mode controller (213) modifies the three dimensional effect in response to the user presence estimate. For example, the display system may provide a two dimensional image when no user is present and a three dimensional image when a user is present. This may reduce discomfort experienced by viewers in suboptimal positions.

Abstract: The invention describes a method of performing face recognition, which method comprises the steps of generating an average face model (MAV)—comprising a matrix of states representing regions of the face—from a number of distinct face images (I1, I2, . . . Ij) and training a reference face model (M1, M2, . . . , Mn) for each one of a number of known faces, where the reference face model (M1, M2, . . . , Mn) is based on the average face model (MAV). A test image (IT) is acquired for a face to be identified, and a best path through the average face model (MAv) is calculated, based on the test image (IT). A degree of similarity is evaluated for each reference face model (M1, M2, . . . , Mn) against the test image (IT) by applying the best path of the average face model (MAV) to each reference face model (M1, M2, . . . , Mn) to identify the reference face model (M1, M2, . . . , Mn) most similar to the test image (IT), which identified reference face mod el (M1, M2, . . .