Technique for edge/corner detection/tracking in image frames
US5311305A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Jun 30, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/54
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Edges/corners in an image can be detected and tracked over time by first sampling the image at periodic time intervals, and then processing the samples to obtain the intensity value for each pixel within each image acquired at a particular time. For each pixel, the bidirectional intraframe correlation of its intensity with the intensities of pixels along each of several directions within the same image is computed. Also, the bidirectional interframe correlation of the intensity of each pixel in each image with the intensities of pixels along each of several directions spanning several images is established. The intraframe and interframe intensity correlations are processed to obtain spatiotemporal tangent information about isobrightness surfaces and curves which are indicative of edges and corners, respectively, and their image motions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.