Apparatus, method, and program for generating range-image-data
US7230685B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Sep 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
First image data including a first pixel value according to the intensity of background light is obtained by means of only exposure. Second image data including a second pixel value according to the intensity of the light reflected or scattered by an object is obtained by so controlling light emission and exposure as to receive part of the reflected or scattered light over the whole exposure period. The part of the reflected or scattered light corresponds to the flat period of emitted pulsed light. Third image data including a third pixel value according to the distance to the object is obtained by so controlling light emission and exposure as to receive the part of the reflected or scattered light for a time according to the distance. The first pixel value is subtracted from each of the second and third pixel values so that the influence of the background light can be excluded. The ratio between the subtraction results is calculated so that the influences of factors that vary the intensity of the reflected or scattered light can be cancelled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.