Device for hierarchical estimation of the motion of image sequences
US5737447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Dec 18, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The device includes a set of processing macromodules connected in cascade and organized in accordance with hierarchical levels. Each macromodule is structured so as to partition the current image into macroblocks of a determined size corresponding to its hierarchical level so as to transmit a motion vector field to the block which follows it, and includes first circuits for calculating the displaced inter-image differences DFDi and the gradients on the basis of the values of luminance of the pixels of the video image and of the displacement vectors of each image preceding or following the current image; second circuits for performing blockwise the summations of the displaced inter-image differences and third circuits for performing corrections of the displacement vectors of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.