Process to extract regions of homogeneous texture in a digital picture
US6693962B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2000 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Feb 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20152
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of extracting regions of homogeneous texture in a digital picture divides the digital picture into blocks, and for each block generates a feature vector as a function of the data moments. From the feature vectors a gradient for each block is extracted in one of two ways, either using a weighted Euclidean distance between the feature vectors or a probability mass function-based distance metric. The gradients are submitted to morphological preprocessing to remove small bumps in the gradient field. A watershed algorithm is then applied to the preprocessed gradient field to segment the gradient field into a set of spatially connected regions of homogeneous texture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.