Patents by Inventor Karel J. Zuiderveld

Karel J. Zuiderveld 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: 5566282
    Abstract: An arrangement and a method for maximum intensity projection of a three-dimensional scene on a two dimensional display (11), via the calculation of first or higher-order interpolated values of points (P.sub.1, . . . , P.sub.m) along rays (61) casted through a voxel representation (50) of said scene avoids unnecessary interpolation operations by, firstly, determining an estimated minimum value for each ray (61) under consideration and for each sample point (P.sub.k) an estimated maximum value for the interpolated value. Only if the estimated maximum value for a point exceeds the estimated minimum value for the ray (61), an interpolation is required. Both estimated extremes are obtained by comparing the values contributing to the interpolations, the estimated minimum value by an analog procedure or by reference to a neighboring ray.
    Type: Grant
    Filed: February 15, 1994
    Date of Patent: October 15, 1996
    Assignee: U.S. Philips Corporation
    Inventor: Karel J. Zuiderveld
  • Patent number: 4870692
    Abstract: Images formed by digital subtraction angiography are improved by subtracting a locally deformed image from another image. A subtraction image is obtained which is substantially free from motion artefacts and which contains only the information of a moving contrast medium. To achieve this, a shift vector is determined for various pixels and a reliability criterion is calculated for each direction component of said shift vector.
    Type: Grant
    Filed: November 30, 1987
    Date of Patent: September 26, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Karel J. Zuiderveld, Ter H. B. M. Romeny