Creation of a linear or planar shape

Data processing: structural design – modeling – simulation – and em – Modeling by mathematical expression

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C700S189000

Reexamination Certificate

active

08036862

ABSTRACT:
A watermark is embossed into a model of a linear or surface shape, especially a non-uniform rational B-splines model. The model has a plurality of splines, the combination of which forms the shape. Control points are assigned to the splines such that a course of the respectively associated spline can be modified and thus be controlled by changing the position of the control points and/or weights of the control points. Nodes which are located in a section of the shape that is formed by the respectively associated spline are allocated to the splines. In order to change the shape (the modified curve runs through point Cmod) when a watermark is embossed into the model, the position of at least one control point is modified, the weight by which a control point affects the shape and thus influences at least one area of the shape is modified, and/or an additional control point is inserted into the model. At least one additional node is inserted into the model (new node at u=1.1875 on the modified curve) in order to obtain information on how the change of the shape can be reversed.

REFERENCES:
patent: 5726896 (1998-03-01), Jia et al.
patent: 6628802 (2003-09-01), Braudaway et al.
patent: 6678378 (2004-01-01), Akiyoshi
patent: 6904394 (2005-06-01), Jaffrey
patent: 6956568 (2005-10-01), Maekawa et al.
patent: 7366909 (2008-04-01), Zhou et al.
patent: 2009/0169050 (2009-07-01), Wolter et al.
patent: 10 2003 0095 476 (2003-12-01), None
Ohbuchi, et al., “Managing CAD Data as a Multimedia Data Type Using Digital Watermarking”, IFIP WG 5.2 Fourth Workshop on Knowledge Intensive CAD, May 22-24, 2000, pp. 1-13, Parma, Italy.
Ohbuchi, et al., “A Shape-Preserving Data Embedding Algorithm for NURBS Curves and Surfaces”, Transactions of the Information Processing Society of Japan, vol. 41, No. 3, Mar. 2000, pp. 559-569.
Praun, et al., “Robust Mesh Watermarking”, Proceedings of the Conference on Computer Graphics (SIGGRAPH '99), ACM Press, pp. 49-56.
Lee, et al., “Watermarking Algorithms for 3D NURBS Graphic Data”, EURASIP Journal on Applied Signal Processing, 14 (2004), pp. 2142-2152.
Lee, et al. “Watermarking for 3D NURBS Graphic Data”, Proceedings of the 2002 IEEE Workshop on Multimedia Signal Processing (Cat. No. 02TH8661) IEEE Piscataway, NJ, USA, 2002, pp. 304-307.
Benedens, O., “Affine Invariant Watermarks for 3D Polygonal and NURBS based Models”, Lecture Notes in Computer Science, vol. 1975 (2000), pp. 15-29.
Piegl, L., “Modifying the shape rational B-splines, Part 1: curves”, Computer Aided Design vol. 21, No. 8 (199), pp. 509-518.
Piegl, L., “Modifying the shape rational B-splines, Part 2: surfaces”, Computer Aided Design vol. 21, No. 9 (1989), pp. 538-546.
Hartley, R., et al., “Multiple View Geometry in Computer Vision”, Cambridge University Press (Jun. 2000), pp. 152-184.
Piegl, L., et al., “The NURBS Book”, Springer Verlag (1995), ISBN 3540615458, pp. 141-188.
Fornaro, C., et al., “Public key watermarking for authentication of CSG models”, Computer-Aided Design vol. 32, No. 12 (2000), pp. 724-735.
Written Opinion of the International Searching Authority dated Oct. 14, 2008.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Creation of a linear or planar shape does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Creation of a linear or planar shape, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Creation of a linear or planar shape will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4283843

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.