Method for motion compensated frame rate upsampling based on piecewise affine warping
US6438275B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1999 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Apr 21, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/014
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Interpolation of a new frame between a previous frame and a current frame of a video stream by motion compensated frame rate upsampling. The interpolation method includes identifying nodes and edges of objects such as triangles present in the previous frame, constructing a superimposed triangular mesh based on the identified nodes and edges, estimating displacement such nodes in the superimposed triangular mesh from the previous frame with respect to the current frame, and rendering the new frame based on the estimated displacement of nodes. Additionally, pixels of the previous frame and the current frame may be classified according to whether a pixel's value has changed from the previous frame to the current frame. This classification may be used during rendering to reduce overall processing time. Pixel-based forward motion estimation may be used to estimate motion of pixels between the previous frame and the current frame and the estimated motion may be used in estimating node displacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.