Back to results
US 2010/0150431 A1Published application
Method of Change Detection for Building Models
AssigneeNational Central University
InventorsLiang-Chien Chen, Chih-Yuan Huang, Tee-Ann Teo
Life of this patent
Estimating the term…
Abstract
Lidar point clouds and multi-spectral aerial images are integrated for change detection of building models. This reduces errors owing to ground areas and vegetation areas. Manifold change types are detected with low cost, low inaccuracy and high efficiency.
Claims9
A method of building model change detection, comprising steps of:
- (a) after data co-registration, detection of ground areas and vegetation areas, and discrete point elimination on ground areas and vegetation areas, calculating height differences between earlier-period three-dimensional (3D) building models and later-period lidar point clouds;
- and
- (b) categorizing said points having height differences to decide change types of said 3D building models step by step,
- wherein said later-period lidar point clouds has later-period ground areas and later-period vegetation areas;
- and
- wherein said change types of said 3D building models comprises no change, main-structure change, micro-structure change, change of building demolished, vegetation occluded, and undefined change.
3 more elements
Dependencies are inferred from the claim text.