Apparatus and method for extracting salient line for information sign
US10438087B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2016 |
| Grant date | Oct 8, 2019 |
| Priority date | — |
| Expiry date | Jul 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/63
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Provided are an apparatus and method for extracting a salient line for an information sign. The apparatus includes an image input portion configured to receive an image including information indication lines to be detected, a signal calculator configured to generate a symmetric function signal consistent with a thickness and a direction of an information indication line having a preset thickness in the received image and perform a convolution of the information indication line and the generated symmetric function signal, a highest value enhancement portion configured to enhance highest values in results of the convolution using a signal quality improvement filter, and a local highest value extractor configured to find local highest values among the enhanced highest values and extract a line connecting the local highest values as a salient line connecting center points in the information indication line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.