Method for estimating the motion of at least one target in a sequence of images and device to implement this method
US5063524A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1989 |
| Grant date | Nov 5, 1991 |
| Priority date | — |
| Expiry date | Nov 9, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/262
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The disclosed method consists in: PA1 method for estimating the motion of at least one target in a sequence of images, including: coefficients transformed by the Fourier transform; PA1 computing a matrix called a phase correlation matrix, each coefficient of which is equal to the product of a transformed coefficient of a first image, by the conjugate of a homologous transformed coefficient of a second image, divided by the square of the modulus of this product; PA1 computing an inverse transformed matrix of the phase correlation matrix, in applying the inverse Fourier transform; PA1 searching, among the coefficients of the inverse transformed matrix, for those coefficients having the greatest moduli; PA1 then estimating a translation vector for each target and a translation vector of the image background, on the basis of the order of the row and of the order of the column in which there are respectively located the coefficients having these greatest moduli.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.