Patents by Inventor Caihui Cui

Caihui Cui 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).

  • Geotagged video spatial indexing method based on temporal information
    Patent number: 11681753
    Abstract: A geotagged video spatial indexing method for video retrieval based on a two-dimensional (2D) temporal grid is disclosed and includes: generating the 2D temporal grid by using the earliest start time, the latest end time of all geotagged video clips and a temporal resolution; calculating row and column number information of each geotagged video clip based on its start time and end time; generating a spatial point for each geotagged video clip based on the row and column number information and obtaining a spatial point set; generating a R-tree spatial index structure corresponding to the spatial point set using a R-tree spatial index method; and locating the corresponding cell in a temporal grid based on retrieval conditions, generating a spatial point based on row and column number information of the grid cell, and finding the spatial point in the R-tree spatial index structure to get the geotagged video corresponding thereto.
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: June 20, 2023
    Assignee: HENAN UNIVERSITY
    Inventors: Zhigang Han, Caihui Cui, Feng Liu, Hongquan Song, Haiying Wang, Fen Qin
  • GEOTAGGED VIDEO SPATIAL INDEXING METHOD BASED ON TEMPORAL INFORMATION
    Publication number: 20230079719
    Abstract: A geotagged video spatial indexing method for video retrieval based on a two-dimensional (2D) temporal grid is disclosed and includes: generating the 2D temporal grid by using the earliest start time, the latest end time of all geotagged video clips and a temporal resolution; calculating row and column number information of each geotagged video clip based on its start time and end time; generating a spatial point for each geotagged video clip based on the row and column number information and obtaining a spatial point set; generating a R-tree spatial index structure corresponding to the spatial point set using a R-tree spatial index method; and locating the corresponding cell in a temporal grid based on retrieval conditions, generating a spatial point based on row and column number information of the grid cell, and finding the spatial point in the R-tree spatial index structure to get the geotagged video corresponding thereto.
    Type: Application
    Filed: September 14, 2022
    Publication date: March 16, 2023
    Inventors: Zhigang Han, Caihui Cui, Feng Liu, Hongquan Song, Haiying Wang, Fen Qin