According to the invention, there is provided a computer-implemented method for designing a three dimensional modeled object in a three dimensional scene, wherein the method comprises the steps of : providing (300) a first curve; duplicating (301) the first curve to obtain a second curve; determining (302) a set of at least one starting point belonging to the first curve; determining (303) a set of at least one target point belonging to the second curve, each target point being associated at least one starting point ; linking (304) the relevant points with their associated target points by using at least a connecting curve.

Embodiments relates to a method for encrypting a 3D object (O) defined at least by a set of first points (p_i) and a set first of faces (F), contained in a bounding box (B), the method being executed by an encryption device and comprising:

- determining (S4) a set of second points (p_si) by bijection of the set of first points (p_i), and a second set of faces (F_s),

- determining (S5) an encrypted 3D object (0_s) defined at least by the set of second points (p_si) and the second set of faces (F_s),



wherein the first points (p_i) are associated with respective first indexes (i), the second points (p_si) are associated with respective second indexes (s_j), and a face is specified by a list of indexes,

wherein the encrypted 3D object (0_s) is contained in said bounding box (B),

the method further comprising:

- partitioning the bounding box (B) into a set of first sub-boxes (n_j),

- determining a set of second sub-boxes (n_sj) by bijection of the set of first sub-boxes (n_j), in function of a secret key (k),



wherein the position of a second point (p_si) is determined in function the position of the corresponding first point (p_i), the position of the first sub-box (n_j) containing the corresponding first point, and the position of the second sub-box (n_sj) corresponding with said first sub-box (n_j).

The display device according to the present invention is provided with a plurality of display units, a mechanism that binds together at least one part of each of the plurality of display units, and a drawing control unit that, when drawing on a specific display unit from among the plurality of display units, prioritizes drawing on, from among the display regions of the specific display unit, a specific region other than regions that include the mechanism.

A ridge flow based fingerprint image quality determination can be achieved independent of image resolution, can be processed in real-time and includes segmentation, such as fingertip segmentation, therefore providing image quality assessment for individual fingertips within a four finger flat, dual thumb, or whole hand image. A fingerprint quality module receives from one or more scan devices ridge-flow--containing imagery which can then be assessed for one or more of quality, handedness, historical information analysis and the assignment of bounding boxes.

A ridge flow based fingerprint image quality determination can be achieved independent of image resolution, can be processed in real-time and includes segmentation, such as fingertip segmentation, therefore providing image quality assessment for individual fingertips within a four finger flat, dual thumb, or whole hand image. A fingerprint quality module receives from one or more scan devices ridge-flow--containing imagery which can then be assessed for one or more of quality, handedness, historical information analysis and the assignment of bounding boxes.

A technique for universally rasterizing graphic primitives used in computer graphics is described. Configurations of the technique include determining three edges and a bounded region in a retrofitting bounding box. Each primitive has real and intrinsic edges. The process uses no more than three real edges of any one graphic primitive. In the case of a line, a third edge is set coincident with one of its two real edges. The area between the two real edges is enclosed by opposing perimeter edges of the bounding box. In the case of a rectangle, only three real edges are used. The fourth edge corresponds to a bounding edge provided by the retrofitting bounding box. In exemplary applications, the technique may be used in mobile video-enabled devices, such as cellular phones, video game consoles, PDAs, laptop computers, video-enabled MP3 players, and the like.

A system providing three-dimensional visual navigation for a mobile unit includes a location calculation unit for calculating an instantaneous position of the mobile unit, a viewpoint control unit for determining a viewing frustum from the instantaneous position, a scenegraph manager in communication with at least one geo-database to obtain geographic object data associated with the viewing frustum and generating a scenegraph organizing the geographic object data, and a scenegraph renderer which graphically renders the scenegraph in real time. To enhance depiction, a method for blending images of different resolutions in the scenegraph reduces abrupt changes as the mobile unit moves relative to the depicted geographic objects. Data structures for storage and run-time access of information regarding the geographic object data permit on-demand loading of the data based on the viewing frustum and allow the navigational system to dynamically load, on-demand, only those objects that are visible to the user.