Image preprocessing for character recognition
US9298980B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Apr 27, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/193
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments provide an image pre-processing method to accelerate image computing tasks. For example, an image is obtained from a camera of a portable computing device. Salient features of the image are identified by a number of techniques, such as identifying feature points, identifying gradients within the image, and other techniques and methods discussed herein. Based at least in part on the identified salient features, a saliency map of the image is computed. The saliency map includes a saliency value for each of at least a portion of the plurality of pixels. In this example pixels above a threshold saliency value are processed with an optical character recognition engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.