Patent ID: 11956532
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 6:
7. A displacement detection device, comprising:
a processor; and
a memory, wherein
the processor, by use of the memory:
obtains a first three-dimensional (3D) model and a second three-dimensional (3D) model,
the first 3D model representing a region at a first timing by 3D points, the second 3D model representing the region at a second timing by 3D points, the second timing being different from the first timing,
the first 3D model including first objects, the second 3D model including second objects;

detects, by use of attribute information of the first objects and the second objects, (i) first 3D points included in the first 3D model and (ii) second 3D points included in the second 3D model and associated with the respective first 3D points;
performs alignment between the first 3D model and the second 3D model; and
detects displacement between the first 3D model and the second 3D model after the alignment, wherein
the detecting of the first 3D points and the second 3D points includes detecting first artificial-object 3D points among the first 3D points and second artificial-object 3D points among the second 3D points associated with the respective first artificial-object 3D points, the first artificial-object 3D points being included in a first artificial object among the first objects, the second artificial-object 3D points being included in a second artificial object among the second objects, and
the alignment is performed by use of the first artificial-object 3D points and the second artificial-object 3D points.