Camera attitude detection device and work region line display device
US9667923B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2014 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | May 19, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided a monitoring camera (32) at a tip of a boom, a monitor (70) configured to display a captured image of a hook suspended from the tip of the boom, an attitude angle calculation device (68) configured to calculate, based on hook image position information on a screen displayed on the monitor (70) and hook position information in a real space, an attitude angle of the camera, and the attitude angle calculation device (68) includes a hook position calculation unit (63) configured to calculate a hook position on the screen actually displayed on the monitor (70), a shift amount calculation unit (64) configured to calculate the distance between the hook position calculated by the hook position calculation unit (63) and a reference hook position of the hook on the screen displayed on the monitor (70) when it is assumed that the camera faces directly downward, and a camera inclination angle calculation unit (65) configured to calculate an inclination angle of the monitoring camera (32) based on the difference and a distance in a height direction from an optical axis center position of the monitoring camera (32) to the hook.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.