Patents by Inventor Cornelis W. A. M. Van Overveld

Cornelis W. A. M. Van Overveld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7456841
    Abstract: An apparatus for texture mapping in a computer graphics system, using a predetermined set of standardized textures. Each texture of the standardized set is a procedural texture, and is supplied to the apparatus as one or a sequence of program commands the execution of which will result in the generation of the respective procedural texture. In a preferred embodiment, the means for processing the program commands comprises a processor operable to implement only those input program commands or sequences of input program commands as are required to generate the procedural textures of the standardized set.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: November 25, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Karl J. Wood, Cornelis W. A. M. Van Overveld, Hendrik Dijkstra, Douglas R. M. Patterson
  • Patent number: 7292238
    Abstract: A number of input images of a scene is taken from different viewpoints. A respective model of the scene is made for each input image. The model contains descriptions of the location of surface patches in the space of the scene, substantially each surface patch corresponding to a set of pixels in the input image. A viewpoint is selected and views are taken from the viewpoint, each of a respective input images according to the corresponding model. For each pixel in an output image one of the views is selected and a pixel from the selected view is displayed at the pixel in the output image.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: November 6, 2007
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Cornelis W. A. M. Van Overveld, Maurice J. M. Cuijpers
  • Patent number: 7110453
    Abstract: In a motion or depth estimation method, a set (CS) of candidate motion vectors, or depth values formed by already obtained motion vectors, or depth values for neighboring image parts which are spatio-temporally adjacent to a given image part of interest, is generated (MV-MEM) for the given image part of interest. Those candidate motion vectors or depth values which correspond to neighboring image parts containing more reliable texture information than other neighboring image parts, are prioritized (TBPD) to obtain a prioritized set (PCS) of candidate motion vectors or depth values. Thereafter, motion or depth data (MV) for the given image part of interest is furnished (ME) in dependence upon the prioritized set (PCS) of candidate motion vectors or depth values. Finally, an image signal processing device (ISPD) processes an image signal (Iin) to obtain an enhanced image signal in dependence upon the motion or depth data (MV).
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: September 19, 2006
    Assignee: Koninklijke Philips Electronics N. V.
    Inventors: Piotr Wilinski, Cornelis W. A. M. Van Overveld
  • Patent number: 6788808
    Abstract: The depth and orientation of a surface patch relative to a camera are determined. A first and second image of the surface patch are obtained from different viewpoints. Various predicted combinations of depth and orientation values are associated with the surface patch. Different available combinations may have different orientations. Each predicted combination predicts a correspondence between points in the first and second image, corresponding points viewing identical locations on the surface patch. One searches for a best combination of depth and orientation so that among the available combinations the best combination results in a minimum aggregate of differences between pixel values of the first and second image at corresponding points.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: September 7, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Cornelis W. A. M. Van Overveld, Antonius A. C. M. Kalker
  • Patent number: 6700994
    Abstract: A digital image signal is watermarked by locally changing geometric features of the image. The watermark consists of a pseudo-random, dense subset of image pixels, e.g., a pattern of lines (20). A number of significant image pixels (21,22,23), i.e., pixels which give the highest response to a predetermined processing operation, is determined and then moved (24) to the vicinity (&dgr;) of the line pattern. As a result of this “warping”, the majority of significant image pixels (21,22) is eventually located within the vicinity of the line pattern. At the receiver end, the most significant pixels of an input image are again determined. The image is a watermarked image if a statistically high percentage lies within the vicinity of the line pattern.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: March 2, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Maurice J. J. J-B. Maes, Cornelis W. A. M. Van Overveld, Peter M. J. Rongen
  • Patent number: 6563873
    Abstract: In a video signal processing method, video signal parts are labeled (L) as non-matchable parts (N-M) if reliable motion or depth information (d1, d2) cannot be obtained for such parts (N-M), motion or depth information (d1, d2) is generated for the video signal (V), and motion or depth information (d1, d2) is produced for the non-matchable parts (N-M) of the video signal (V) from the motion or depth information generated for the video signal (V).
    Type: Grant
    Filed: March 14, 2000
    Date of Patent: May 13, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Piotr Wilinski, Cornelis W. A. M. Van Overveld
  • Patent number: 6519350
    Abstract: A method and arrangement for embedding a watermark in an image are disclosed. The watermark consists of a pseudo-random, dense subset of image pixels, e.g. a pattern of lines (20). A number of salient image pixels (21-26), for example, local extremes, corners or edges, is identified and it is determined whether they lie on (i.e. within a vicinity &dgr; of) the line pattern (21-23) or not (24-26). In an unwatermarked image (FIG. 2A), the number of most salient pixels (21) lying on the watermark is substantially the same as the number of most salient pixels (25,26) not lying on the watermark. The image is watermarked (FIG. 2B) by modifying the saliency of the salient pixels in such a way that a significant majority (21,23) of the most salient pixels (21,23,25) is eventually located within the vicinity of the line pattern.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: February 11, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Cornelis W. A. M. Van Overveld, Peter M. J. Rongen, Maurice J. J. J.-B. Maes
  • Patent number: 6515668
    Abstract: An implicit surface is defined by a time dependent implicit surface model. From the implicit surface model a first and second mesh of control points of a first and second non-linear coordinate valued functions such as second degree Bezier functions are computed respectively. The first and second non-linear coordinate valued function represent approximations of the implicit surface at a first and second point in time respectively. The points of the first mesh are used as a starting point for computing an approximation of the second mesh of points. The surfaces defined by the first and second non-linear coordinate valued function respectively are rendered for example by approximating each by a respective mesh of flat triangles.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: February 4, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes Bruijns, Cornelis W. A. M. Van Overveld
  • Patent number: 6407744
    Abstract: In computer graphics the image of a surface patch is computed, including specular reflections (mirror-like reflections) from the surface patch. A bump map is used to perturb the normal to a surface, so as to simulate bumps on the surface, which cause specular reflection highlights. The bump map assigns a perturbation vector to each point on several different surface patches and the same perturbation is applied to corresponding points on different surface patches, irrespective of orientation and shape differences between the surface patches. Preferably, the perturbation vector is always parallel to the viewscreen direction, irrespective of the direction of the normal that is being perturbed.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: June 18, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Cornelis W. A. M. Van Overveld
  • Publication number: 20020057277
    Abstract: An apparatus (34) for texture mapping in a computer graphics system, using a predetermined set of standardised textures. Each texture of the standardised set is a procedural texture, and is supplied to the apparatus (34) as one or a sequence of program commands (44) the execution of which will result in the generation of the respective procedural texture. In a preferred embodiment, the means for processing the program commands (4) comprises a processor operable to implement only those input program commands or sequences of input programme commands as are required to generate the procedural textures of the standardised set.
    Type: Application
    Filed: July 17, 1998
    Publication date: May 16, 2002
    Inventors: KARL J. WOOD, CORNELIS W.A.M. VAN OVERVELD, HENDRIK DIJKSTRA, DOUGLAS R.M. PATTERSON
  • Publication number: 20010002931
    Abstract: A digital image signal is watermarked by locally changing geometric features of the image. The watermark consists of a pseudo-random, dense subset of image pixels, e.g., a pattern of lines (20). A number of significant image pixels (21,22,23), i.e., pixels which give the highest response to a predetermined processing operation, is determined and then moved (24) to the vicinity (&dgr;) of the line pattern. As a result of this “warping”, the majority of significant image pixels (21,22) is eventually located within the vicinity of the line pattern. At the receiver end, the most significant pixels of an input image are again determined. The image is a watermarked image if a statistically high percentage lies within the vicinity of the line pattern.
    Type: Application
    Filed: January 19, 2001
    Publication date: June 7, 2001
    Applicant: U.S. PHILIPS CORPORATION
    Inventors: Maurice J.J.J-B. Maes, Cornelis W.A.M. Van Overveld, Peter M.J. Rongen
  • Patent number: 6198832
    Abstract: A digital image signal is watermarked by locally changing geometric features of the image. The watermark consists of a pseudo-random, dense subset of image pixels, e.g., a pattern of lines (20). A number of significant image pixels (21,22,23), i.e., pixels which give the highest response to a predetermined processing operation, is determined and then moved (24) to the vicinity (&dgr;) of the line pattern. As a result of this “warping”, the majority of significant image pixels (21,22) is eventually located within the vicinity of the line pattern. At the receiver end, the most significant pixels of an input image are again determined. The image is a watermarked image if a statistically high percentage lies within the vicinity of the line pattern.
    Type: Grant
    Filed: January 7, 1999
    Date of Patent: March 6, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Maurice J. J. J-B. Maes, Cornelis W. A. M. Van Overveld, Peter M. J. Rongen
  • Patent number: 6057843
    Abstract: For visualizing on a two-dimensional screen a hierarchical information structure that is based on nodes interconnected by edges, first an actual root node is selected. The root node is visualized on the screen as a fisheyed representation of a root node block. Downstepping will at one or more next-lower hierarchical levels select a descendant node of the actual root node for display. At each downstepping the representation is divided along alternatingly at least a first and a second coordinate direction into lower level visual slices, of which the selected descendant is placed in a central part of the fisheye. Finally, access is allowed to at least one node of the graph whose image is displayed within the actual fisheye.
    Type: Grant
    Filed: April 14, 1998
    Date of Patent: May 2, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis W. A. M. Van Overveld, Erik A. J. Peeters, Jaco W. Schoonen
  • Patent number: 6049337
    Abstract: Parallactic changes in the appearance of a surface are simulated using texture mapping. When an image is computed, more than one texture is mapped to the same surface. The coordinate maps of those textures are shifted relative to each other when the viewpoint from which the surface is viewed changes. One texture is normally shown on a pixel the surface, unless indicates a "transparent" state for that pixel, in which case the other texture is shown.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: April 11, 2000
    Assignee: U. S. Philips Corporation
    Inventor: Cornelis W. A. M. Van Overveld