Devices and methods for restoring low-resolution text images
US8437551B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/0084
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system that extracts text from an image includes a capture device that captures the image having a low resolution. An image segmentation subsystem partitions the image into image segments. An image restoration subsystem generates a resolution-expanded image from the image segments and negates degradation effects of the low-resolution image by transforming the image segments from a first domain to a second domain and deconvolving the transformed image segments in the second domain to determine parameters of the low-resolution image. A text recognition subsystem transforms the restored image data into computer readable text data based on the determined parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.