Edge detection apparatus, program and method for edge detection
US9064178B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Aug 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/44
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the conventional technology for edge detection by normalizing brightness value of a target pixel C for edge determination and brightness of peripheral blocks of the target pixel C, an effect on an image due to a camera lens has not been considered. Specifically, the camera lens has a circular shape and the photographed image is basically formed by circularly collected light. In the conventional technology, however, it has been difficult to carry out high-precision edge detection due to rectangular shape of the peripheral blocks. In order to solve the above deficiency, in an aspect of the present invention provides an edge detection apparatus having a function of weighting the pixel values in the ‘peripheral area’ to be compared with the target pixel C for edge determination, such that the peripheral area has the circular shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.