INTER-FRAME PREDICTION OF MEDICAL AND VIDEOPHONE SEQUENCES: A DEFORMABLE TRIANGLE-BASED APPROACH
| Autor: | Andre Zaccarin, Mehran Yazdi |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Motion compensation
business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Inter frame Grid Computer Graphics and Computer-Aided Design Computer Science Applications Reduction (complexity) Triangle mesh Polygon mesh Computer vision Computer Vision and Pattern Recognition Artificial intelligence Affine transformation business ComputingMethodologies_COMPUTERGRAPHICS Data compression Mathematics |
| Zdroj: | International Journal of Image and Graphics. :453-467 |
| ISSN: | 1793-6756 0219-4678 |
| Popis: | Motion compensation using deformable triangle patches has been successfully used for low bit rate coding of videophone sequences. They were also shown to be particularly efficient for interframe coding of MRI sequences, for which the difference between image slices can be well modeled by locally affine deformations. Regular triangular meshes were used in previous works. In this paper, we present a quadtree decomposition algorithm to generate a triangle mesh for which smaller triangles are used in image areas where the motion or deformation is more complex. Grid points are recursively added to areas where the reduction in prediction error is more significant. Results show that using variable size triangular patches increases the PSNR of the motion-compensated image while reducing the number of grid points when compared to a regular triangular mesh. |
| Databáze: | OpenAIRE |
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