Global zoom/pan estimation and compensation for video compression
- 1 January 1991
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 2725-2728 vol.4
- https://doi.org/10.1109/icassp.1991.150965
Abstract
An algorithm is presented for estimating and compensating camera zooms and pans. It models the global motion in each frame with just two parameters: a zoom factor and a two-dimensional pan vector both based on local displacement vectors found by conventional means (such as block matching). Since motion by objects in the scene obscures global motion, the algorithm can iterate to refine its estimate. Simulations suggest the algorithm is robust and accurate, and can significantly reduce both the energy of the motion compensated residual image as well as the zeroth-order entropy of the local displacement vector field.Keywords
This publication has 3 references indexed in Scilit:
- A differential method for simultaneous estimation of rotation, change of scale and translationSignal Processing: Image Communication, 1990
- Differential estimation of the global motion parameters zoom and panSignal Processing, 1989
- Predictive Coding Based on Efficient Motion EstimationIEEE Transactions on Communications, 1985