Patents by Inventor Hak-Yeol Choi

Hak-Yeol Choi 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).

  • Three-dimensional mesh model watermarking method using segmentation and apparatus thereof
    Patent number: 10769745
    Abstract: Disclosed is a 3D mesh model watermarking method using a divisional scheme. The method of inserting a watermark into a three-dimensional (3D) mesh model includes: calculating a geometric primitive of the 3D mesh model; dividing the 3D mesh model into a plurality of mesh segments by using the geometric primitive; converting the mesh segments into mesh segments of a vertex distance-based coordinate system; inserting a predetermined watermark into each of the mesh segments of the vertex distance-based coordinate system; and restoring the mesh segments into which the watermark is inserted to a Cartesian coordinate system.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 8, 2020
    Assignee: The Korea Advanced Institute of Science and Technology
    Inventors: Heung-Kyu Lee, Han-Ul Jang, Hak-Yeol Choi, Jeongho Son, Seung-Min Mun, Dongkyu Kim, Jong-Uk Hou, Wookhyung Kim
  • Watermark embedding apparatus and method, and watermark detecting apparatus and method for 3D printing environment
    Patent number: 10438311
    Abstract: In a watermark embedding method and apparatus, a layered three-dimensional model is aligned in a printing direction based on a layering direction of the layered three-dimensional model. Then, a watermark having a predetermined pattern is embedded into the aligned three-dimensional model in a direction orthogonal to the printing direction so that the embedded watermark is not associated with the printing direction.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 8, 2019
    Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Heung-Kyu Lee, Jong-Uk Hou, Hak-Yeol Choi, Hyun-Ji Song, Do-Gon Kim, Han-Ul Jang
  • WATERMARK EMBEDDING APPARATUS AND METHOD, AND WATERMARK DETECTING APPARATUS AND METHOD FOR 3D PRINTING ENVIRONMENT
    Publication number: 20180114289
    Abstract: In a watermark embedding method and apparatus, a layered three-dimensional model is aligned in a printing direction based on a layering direction of the layered three-dimensional model. Then, a watermark having a predetermined pattern is embedded into the aligned three-dimensional model in a direction orthogonal to the printing direction so that the embedded watermark is not associated with the printing direction.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 26, 2018
    Inventors: Heung-Kyu LEE, Jong-Uk HOU, Hak-Yeol CHOI, Hyun-Ji SONG, Do-Gon KIM, Han-Ul JANG
  • THREE-DIMENSIONAL MESH MODEL WATERMARKING METHOD USING SEGMENTATION AND APPARATUS THEREOF
    Publication number: 20170213310
    Abstract: Disclosed is a 3D mesh model watermarking method using a divisional scheme. The method of inserting a watermark into a three-dimensional (3D) mesh model includes: calculating a geometric primitive of the 3D mesh model; dividing the 3D mesh model into a plurality of mesh segments by using the geometric primitive; converting the mesh segments into mesh segments of a vertex distance-based coordinate system; inserting a predetermined watermark into each of the mesh segments of the vertex distance-based coordinate system; and restoring the mesh segments into which the watermark is inserted to a Cartesian coordinate system.
    Type: Application
    Filed: December 21, 2016
    Publication date: July 27, 2017
    Inventors: Heung-Kyu Lee, Han-Ul Jang, Hak-Yeol Choi, Jeongho Son, Seung-Min Mun, Dongkyu Kim, Jong-Uk Hou, Wookhyung Kim